Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

This historic hotel invented the chocolate brownie.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

A fortified palace in the shape of a ship on the Thiou river.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.