New Delhi is the capital of India and an administrative district of NCT Delhi. New Delhi is also the seat of all three branches of the government of India, hosting the Rashtrapati Bhavan, Parliament House, and the Supreme Court of India. Delhi itself is often considered as a hub for international trade. Delhi and New Delhi are used interchangeably to refer to the National Capital Territory of Delhi (NCT), these are two distinct entities, with New Delhi forming a small part of the city of Delhi. The National Capital Region is a much larger entity comprising the entire NCT along with adjoining districts in neighboring states. As a significant economic, transport, and cultural center, as well as the political center of India, Delhi is of great historical significance.

The climate of New Delhi is a hot semi-arid climate bordering on a dry-winter humid subtropical climate with high variation between summer and winter in terms of both temperature and rainfall. The area's version of a humid subtropical climate is noticeably different from many other cities with this climate classification in that it features long and very hot summers with dust storms, relatively dry and mild winters with wildfire haze, and a monsoonal period. Summers are long, extending from early April to October, with the monsoon season occurring in the middle of the summer. Winter starts in November and peaks in January.

Religious festivals celebrated in New Delhi include Diwali (the festival of lights), Maha Shivaratri, Teej, Durga Puja, Mahavir Jayanti, Guru Nanak Jayanti, Holi, Lohri, Eid ul-Fitr, Eid ul-Adha, Easter, Raksha Bandhan, and Christmas. The Qutub Festival is a cultural event during which performances of musicians and dancers from all over India are showcased at night, with the Qutub Minar as the chosen backdrop of the event.Other events such as Kite Flying Festival, International Mango Festival and Vasant Panchami (the Spring Festival) are held every year in Delhi.

Kolkata is the capital of the Indian state of West Bengal. It is the prime business, commercial, and financial hub of eastern India and the main port of communication for the North-East Indian states, as well as has the third-largest urban economy of India. The Port of Kolkata is India's oldest operating port and its sole major riverine port. Kolkata is known as the "cultural capital of India" for the city's historical and architectural significance. It is a demographically diverse city, the culture of Kolkata features distinctively close-knit neighborhoods and freestyle conversations.

Kolkata is home to West Bengal's film industry Tollywood, and cultural institutions, such as the Academy of Fine Arts, the Victoria Memorial, the Asiatic Society, the Indian Museum and the National Library of India. Kolkata also hosts the Agri Horticultural Society of India, the Geological Survey of India, the Botanical Survey of India, the Calcutta Mathematical Society, the Indian Science Congress Association, the Zoological Survey of India, the Institution of Engineers, the Anthropological Survey of India and the Indian Public Health Association.

Kolkata has a tropical wet-and-dry climate. Summers (March–June) are hot and humid, with temperatures the temperature of 30 °C to 40 °C. Winter lasts for roughly two-and-a-half months, with seasonal lows dipping to 9–11 °C in December and January. May is the hottest month in this city. The winter is mild and very comfortable weather pertains over the city throughout this season. Often, in April–June, the city is struck by heavy rains or dusty squalls that are followed by thunderstorms or hailstorms, bringing cooling relief from the prevailing humidity.

Kolkata has been called the "City of Furious, Creative Energy" as well as the "cultural capital of India''. Key elements of Kolkata's cuisine include rice and a fish curry known as macher jhol, which can be accompanied by desserts such as roshogolla, sandesh, and a sweet yoghurt known as mishti dohi. Bengal's large range of seafood dishes includes various preparations of ilish, street foods such as beguni, kati roll, puchka and Indian Chinese cuisine from Chinatown are popular.

Durga Puja, held in September–October, is Kolkata's most important and largest festival, it is an occasion for glamorous celebrations and artistic decorations. The Bengali New Year, Poush Parbon is among the city's other festivals. Other festivals celebrated are Kali Puja, Diwali, Holi, Jagaddhatri Puja, Saraswati Puja, Rathayatra, Janmashtami, Maha Shivratri, Vishwakarma Puja, Lakshmi Puja, Ganesh Chathurthi, Makar Sankranti, Gajan, Kalpataru Day, Bhai Phonta, Maghotsab, Eid, Muharram, Christmas, Buddha Purnima and Mahavir Jayanti.

Located on the coast of Maharashtra, Mumbai is the most populous city in India and it is one of the world’s largest and most densely populated urban areas. The cultural life of Mumbai is representative of its ethnically diverse community. A variety of museums, libraries, literary societies, art galleries, theatres and other cultural institutions are located in the area. Mumbai is home to three UNESCO World Heritage Sites: the Elephanta Caves, Chhatrapati Shivaji Maharaj Terminus, and the city's distinctive ensemble of Victorian and Art Deco buildings.

Mumbai is the economic hub of India, the epicenter of fashion, and a pulse point of religious tension. As the country's commercial hub, Mumbai is very attractive to those in search of work and better job prospects. In pursuit of a better life, migrants from every part of the world come to the city every day so the term 'City of Dreams' has been used to define this city. It has been named one of the most populous and crowded cities in the world and at the same time is known as a hub of numerous opportunities in the fields of technology and innovation.

Mumbai has a tropical climate. It varies between a dry period extending from October to May and a wet period peaking in June. The cooler season from December to February is followed by the hotter season from March to May. Flooding during monsoon is a major problem for Mumbai. Between June and September, the southwest monsoon rains lash the city. Pre-monsoon showers are received in May. Occasionally, north-east monsoon showers occur in October and November.

Mumbai's culture is a blend of traditional festivals, food, music, and theatres. The city offers a cosmopolitan and diverse lifestyle with a variety of food, entertainment, and nightlife, available in a form and abundance comparable to that in other world capitals. Mumbai's history as a major trading center has led to a diverse range of cultures, religions, and cuisines coexisting in the city. This unique blend of cultures is due to the migration of people from all over India since the British period.

Mumbai is also the birthplace of Indian cinema, Dadasaheb Phalke laid the foundations with silent movies followed by Marathi talkies. Mumbai also has a large number of cinema halls that feature Bollywood, Marathi, and Hollywood movies.

Hyderabad is the capital and largest city of the Indian state of Telangana. There are a number of masjids, temples, churches and bazaars in the city. Hyderabad is known as The City of Pearls, as once it was the only global centre for trade of large diamonds, emeralds and natural pearls. It is also called the place of nawabs. The tourism industry forms an important role in the economy of Hyderabad. The city houses famous historical sites including Charminar, UNESCO Asia Pacific Heritage site of the Chowmahalla Palace, Salar Jung Museum (among the world's largest private collection museums) as well as art galleries, libraries, sports complexes, museums and theaters. There are many traditional and historical bazaars located around the city. Some of the top universities of Hyderabad include Osmania University, International Institute of Information Technology, Jawaharlal Nehru Architecture and Fine Arts University, Jawaharlal Nehru Technological University, University of Hyderabad and so on.

Hyderabad has a tropical wet and dry climate bordering on a hot semi-arid climate. Summers (March–June) are hot and humid, with average highs in the mid-to-high 30°Celsius, maximum temperatures often exceed 40 °C between April and June. The coolest temperatures occur in December and January, when the lowest temperature occasionally dips to 10 °C. May is the hottest month, when daily temperatures range from 26 to 39 °C. Heavy rain from the south-west summer monsoon falls between June and September, supplying Hyderabad with most of its mean annual rainfall.

Hyderabadi cuisine comprises a broad range of rice, wheat and meat dishes and the skilled use of various spices. The Hyderabadi biryani and Hyderabadi haleem with their blend of Mughlai and Arab cuisines, are some of the most popular part of Hyderabadi cuisine. The cuisine is somewhat influenced by French, but more by Arabic, Turkish, Iranian and native Telugu and Marathwada cuisines. Popular native dishes include nihari, chakna, bagara baingan and the desserts qubani ka meetha, double ka meetha and more.

Bangalore is the capital of the Indian state of Karnataka. Bangalore is widely regarded as the "Silicon Valley of India" (or "IT capital of India") because of its role as the nation's leading information technology (IT) exporter. The city also has many other names, including the Knowledge Centre of India, India’s Aerospace and Machine Tools Hub, and India’s Garden City. A demographically diverse city, Bangalore is the second fastest-growing major metropolis in India. It is home to many educational and research institutions. Numerous state-owned aerospace and defense organizations, are located in the city. The city also houses the Kannada film industry.

Bangalore has a tropical savanna climate with distinct wet and dry seasons. Due to its high elevation, Bangalore usually enjoys a more moderate climate throughout the year, although occasional heat waves can make summer somewhat uncomfortable. The coolest month is January and the hottest month is April. Bangalore receives rainfall from both the northeast and the southwest monsoons and the wettest months are September, October and August, in that order. The summer heat is moderated by fairly frequent thunderstorms, which occasionally cause power outages and local flooding.

Due to the presence of many public parks, such as Lal Bagh and Cubbon Park the city is also known as India Garden City. Biannual flower shows are held at the Lal Bagh Garden during the week of Republic Day (26 January) and Independence Day (15 August). Bengaluru Karaga or "Karaga Shaktyotsava" is one of the most important and oldest festivals of Bangalore dedicated to the Hindu Goddess Draupadi. Other popular festivals in Bangalore are Ugadi, Ram Navami, Eid ul-Fitr, Ganesh Chaturthi, St. Mary's feast, Dasara, Deepawali and Christmas.

The diversity of cuisine is reflective of the social and economic diversity of Bangalore. Bangalore has a wide and varied mix of restaurant types and cuisines and Bangaloreans deem eating out as an intrinsic part of their culture. Bangalore is also home to many vegan-friendly restaurants and vegan activism groups, and has been named as India's most vegan-friendly city by PETA India.

The Central College of Bangalore is the oldest college in the city. Some other institutes in Bangalore are The Bangalore University, University Visvesvaraya College of Engineering, International Centre for Theoretical Sciences, Indian Institute of Astrophysics, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), National Institute of Mental Health and Neuro Sciences (NIMHANS) and more.