Boudha is a stupa (dome shaped Buddhist shrine) in Kathmandu. Its massive mandala symbolizes the Buddhist cosmos. Four of the Dhyani Buddhas mark the cardinal points, with the fifth, Vairocana, enshrined in the center. The five Buddhas also personify the five elements (earth, water, fire, air, and ether), which are represented in the stupa’s architecture. The Boudha Stupa is a UNESCO World Heritage Site.