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There are two lists for this: The 7 Wonders of India by NDTV (A Survey Conducted by the Ministry of Tourism along with NDTV) and The 7 Wonders of India by Times of India (Survey Conducted Through SMS).
The 7 Wonders of India by NDTV - A Survey Conducted in 2008-2009
1. Meenakshi Amman Temple. Located in Madurai in Tamil Nadu, this is a temple dedicated to Parvati and Shiva. It is believed that the temple dates as far back as the early years of A.D. But the temple was almost destroyed in 1310 after the attack of Malikkapur. He is an Islamic conqueror and was intolerant to other religions, hence the destruction of the temple. Thankfully, the temple was restored in the 14th Century when the Hindu Rulers came back to power in Madurai.
2. Dholavira Reservoir. Located in the Kutch District of Gujarat, you'd fine this ancient marvel of hydro-engineering that the Harappans have invented. You would also see some inscriptions here although it's still undeciphered now. It's a proof of one of the first written languages in India. There's also a small museum in the area, where artefacts excavated in the region are displayed.
3. Red Fort. Located in Delhi, this is an UNESCO World Heritage Site. It was built under the leadership of Shah Jahan showcasing the majesty of Mughal architecture. But besides that, you'll find elements of other architectural styles like Islamic, Persian and Timurid.
4. Jaisalmer Fort. Located in Jaisalmer in Rajasthan, this was once home to the Rajputs. They built this fort to protect themselves from outside enemies. It is now considered as a living fort, as about 3,000 people still live here.
5. Konark Sun Temple. Located in Konark in Odisha, this is yet another UNESCO World Heritage Site. It is known all over the world for its intricate sculptural work and grandeur. The entire temple is an image of the Sun God with about 24 wheels, all intricately designed with quite elaborate carvings.
6. Nalanda. Located in Bihar and built during the 5th Century A.D. It was a school mostly dedicated to Buddhist learning but other fields like science, mathematics and astronomy were also taught here. It is also one of the first schools to have a dormitory for students. Perhaps its main feature is its nine-storey library where monks copied several books and documents so the students can have their own collections.
7. Khajuraho Group of Monuments. Located in Chhatarpur in Madhya Pradesh, another UNESCO World Heritage Site. There were about 85 temples until the 12th Century but now, only the 20 remaining temples have survived. The temples are dedicated to both Hinduism and Jainism.
The 7 Wonders of India by Times of India
1. Gomateshwara. Located in Karnataka, this is a 60 feet statue of Gomateshwara. Devotees visit the statue especially during the Maha-Mastak-Abhisheka Festival. It is observed every 12 to 14 years and so lots of devotees set some time to visit the statue. The Jain devotees wash the head of the statue with water, milk, honey, or sandal (with about eight different types of sandal paste).
2. Harmandir Sahib or Golden Temple. Located in Punjab, this was designed by Guru Arjan. It's a pilgrim site for Sikh devotees.
3. Taj Mahal. Located in Agra in the state of Uttar Pradesh. It was Shah Jahan who built this for his third wife, Mumtaz Mahal who died after giving birth to their baby. It was completed after about 22 years of work. The Taj Mahal changes colours all throughout the day and it's especially mesmerising during the sunset.
4. Hampi. Located in Karnataka, this is one of the UNESCO World Heritage Sites. It's mostly in ruins now but still a testament of the beauty of the architecture at that time.
5. Konark Sun Temple. This was also included in the list above. It is mostly in ruins now but you can still see the majesty of its architecture.
6. Nalanda. This was also included in the list above. It is said that students all over the world would go to India to study in Nalanda. Sadly, the university was destroyed in 12th Century AD by an army of Turkish Muslims.
7. Khajuraho Group of Monuments. This was also included in the list above. This has Nagara style of architecture and is most famous for its unique sculptures.
There you go. I hope this helps!