Dharahara धरहरा, also called Bhimsen Tower, was a nine-storey, 203.0 ft tower at the centre of Sundhara in Kathmandu. It was built in 1832 by Mukhtiyar Bhimsen Thapa under the commission of Queen Lalit Tripura Sundari and was a part of the architecture of Kathmandu recognized by UNESCO.
The tower had a spiral staircase containing 213 steps. The eighth floor held a circular balcony for observers that provided a panoramic view of the Kathmandu valley. It also had a 17 ft bronze mast on the roof.
Most of the tower collapsed in the 25 April 2015 Nepal earthquake.