The most remarkable single attraction in Karnataka has to be the ruins of the ancient city of Hampi.
Traces of a two-millennia-old civilization have been found at Hampi, but the UNESCO World Heritage Group of Monuments at Hampi are a mere five-to seven-centuries old. Hampi was the last Capital of the Great Vijayanagar Empire, and the amazing monuments here are definitely matched by the incredibly scenic landscape strewn with massive boulders.
The landscape is surreal and breathtaking. Amidst hundreds of square kilometers of granite hills and boulders are the remains of a civilization that was unmatched in its heyday.
It is my opinion that Hampi, along with the Taj Mahal and the caves at Ajanta & Ellora, make up the most impressive attractions in a country that is overflowing with magnificent achievements made by ancient and medieval man.
Two days of exploration at Hampi are a must to really savor the amazing city and its granite monuments. The Vijayanagar Empire thrived here from the 14th - 17th centuries. The estimates of the local population during that period range from over 500,000 to almost a million residents, and the city was said to have been surrounded by an army of about a million soldiers.