This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

Experience a charming 1930's version of "infotainment."

Macabre astrological automaton clock dating to the late 1400s.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

The "lovely red Vega" of the legendary record-settling pilot.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

An Austrian house of bones filled with hundreds of intricately painted skulls.