Here's a list of India's most lucrative historical sites, based on the revenues they earned in 2013-2014.
1) Taj Mahal, Agra
Revenue: Rs. 21,84,88,950
The Taj, Mughal emperor Shah Jahan's marble tribute to his third wife, Mumtaz Mahal, is by far the most iconic structure in India, as well as the country's biggest-earning monument.
2) Qutab Minar complex, Delhi
Revenue: Rs 10,16,05,890
The Qutub Minar was built in the early 13th century and is the second-tallest tower in India (after Mohali's Fateh Burj). It is made out of red and buff sandstone and is a UNESCO World Heritage Site.
3) Agra Fort, Agra
Revenue: Rs 10,22,56,790
Agra Fort, another UNESCO World Heritage site, was constructed under the third Mughal emperor Akbar. Some of the great Mughal emperors lived here: Babur, Humayun, Akbar and Jahangir, among others. The country was governed from this fort.
4) Humayun's Tomb, Delhi
Revenue: Rs 7,12,88,110
The tomb of the Mughal emperor Humayun was built in 1572 by his widow, Bega Begum.
5) Red Fort, Delhi
Revenue: Rs 6,15,89,750
The Red Fort served as a palace for Shahjahanabad during the reign of Shah Jahan. The fort derives its name from the red sandstone that is on all eight sides of the structure. It remained a residence for Mughal emperors for 200 years.
6) Group of monuments, Fatehpur Sikri
Revenue: Rs 5,62,14,640
The "abandoned" city of Fatehpur Sikri was founded in 1569 by the Mughal emperor Akbar. It served as his capital from 1571 until 1585.
7) Group of monuments at Mahabalipuram
Revenue: Rs 2,72,93,480
The sculpted temples and buildings in this town, 60 kms south of Chennai, are the remains of a port from where ancient Indian traders travelled to Southeast Asia.
8) Sun Temple, Konarak
Revenue: Rs 2,43,52,060
This 13th-century temple in Odisha depicts a solar chariot. The sculpture features 12 pairs of intricately-carved wheels pulled by seven galloping steeds.
9) Group of temples, Khajuraho
Revenue: Rs 2,24,47,030
Khajuraho, in Madhya Pradesh, is synonymous with this large group of medieval Hindu and Jain temples, some of which feature famed erotic sculptures.
10) Ellora Caves
Revenue: Rs 2,06,72,820
The Ellora Caves are located 26kms from Aurangabad. The Kailash temple is one of the largest monolithic structures in the world and resides here.