Khao Wang, the famous old royal palace complex on the mountain has a huge, very elegant stupa, some caves with bats, shrines and animal sacrifices, a well-sculpted, vast gold-plated reclining Buddha and a museum. Depending on the entrance you take you may be charged a tourist tax (150 baht, includes entry to the museum on the top). The main entrance is infested by extremely chubby and impertinent monkeys. You can buy bananas for them from numerous small retailers. But beware, give them attention and they'll try to grab anything you might be pointing at them. There is a cable car (20 baht for Thais, 200 baht for foreigners). Unlike many places, they will not allow foreigners with valid ID working in Thailand to enter for the Thai price. In other words, foreigners should walk.