The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Of five volcanoes located in the massive Tengger caldera, this cone is the youngest and most active.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Come for the flowers, stay for the bats!

The famed literary character has a unique connection to this city.

Caves that can't seem to quit producing the remains of prehistoric humans.

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

This colonial fort is an intriguing example of Renaissance military architecture.

An Ethiopian cloud forest protects some of the last wild arabica plants.

A historic chapel filled with colorful murals and a colorful past.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

An ancient knight and a symbol of the city's freedom.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A tiny church on a man-made island in the Adriatic.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

A marvel of Byzantine engineering under the streets of Istanbul.

A sixth-century Byzantine cistern hidden below a modern carpet store.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.