Delhi, the city of garden and park, is the capital and union territory of India. It constitutes two quite distinctive worlds, New Delhi and Old Delhi. New Delhi, inaugurated in 1931 by the British as the imperial capital, is the country's modern capital and seat of government, whereas Old Delhi is considered the heart of the greater metropolitan region. All the former locations of Delhi are enclosed in a triangle-shaped area of about 70 square miles, generally known as the Delhi Triangle. Two borders of this triangle are linked, one side by the Aravalli hills to the south of it and another one on its western edge called the Delhi Ridge.

Delhi, the city of garden and park, is the capital and union territory of India. It constitutes two quite distinctive worlds, New Delhi and Old Delhi. New Delhi, inaugurated in 1931 by the British as the imperial capital, is the country's modern capital and seat of government, whereas Old Delhi is considered the heart of the greater metropolitan region. All the former locations of Delhi are enclosed in a triangle-shaped area of about 70 square miles, generally known as the Delhi Triangle. Two borders of this triangle are linked, one side by the Aravalli hills to the south of it and another one on its western edge called the Delhi Ridge. The last side of the triangle is shaped by the shifting path of the infamous Yamuna River. In the middle of the hills and the river lies wide-ranging alluvial plains; the elevation of the city varies from 700 to 1,000 feet which is approx. 200 to 300 meters. Delhi has one of India's fastest and largest growing retail industries. Key service industries are telecommunications, information technology, hotels, media, banking, and tourism. Health, construction, power, and community services, along with retail real estate, are also essential to the city's economy. Delhi is also a center for all kinds of shopping. Sarojini Nagar, Connaught Place, Chandni Chowk, and Dilli Haat are the main retail marketplaces in Delhi. Renowned shopping malls consist of Select Citywalk, DLF Promenade, Pacific Mall, DLF Emporio, Ansal Plaza, and Metro Walk. Flowering plants are another attraction that comprises numerous types of multicolored seasonals namely violas, chrysanthemums, phlox, and verbenas. Culture in Delhi is influenced by the history and its association as the capital of the country; Delhi is also known as Indraprastha, also the capital for the Pandavas. The Archaeological Survey identifies 175 monuments and 1,200 heritage buildings as national heritage sites. In 2015, Euromonitor International ranked the city as 28th-most visited place in the world and foremost in India in terms of foreign visitors. There are several tourist attractions, both modern and historic. The 3 UNESCO World Heritage Sites, Red Fort, Qutb, Humayun's Tomb, and Qutb Complex are some of the best examples of Indo-Islamic architecture. Some of the other major landmarks of Delhi are India Gate, Akshardham, Laxminarayan Temple, Lotus Temple, Lal Mandir, Gurudwara Bangla Sahib, and many more.