The Varanasi Observatory, situated on the rooftop level of the Mana Mahala (palace) in Varanasi, includes a large and small Samrat Yantra, Digamsa Yantra, Chakra Yantra, Nadivalaya, and Daksinottara Bhitti Yantra.This view from the top of the gnomon of the Samrat Yantra shows the observatory and palace complex, and in the distance the river Ganges.