An extraordinary "City of Caves" carved from solid stone.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Sacred Indian temple that’s all monkey business.

The world's second-largest sundial, made entirely out of stone.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

A preserved college lock-up that recalls a clubhouse approach to discipline.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

Go surfing on this urban wave, "hacked" by local surfers.

The patron saint of spinsters grasps a container of dried blood.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.