A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

A vibrant, 100-foot-tall mural dedicated to Evelyn Nesbit, the tragic icon of the Gilded Age.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

Ripped apart by a bomb in 1993, the shell of Pablo Escobar's infamous vacation house still stands.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

Not quite the menace it once was, this monster still has some chops.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

Tucked away on a scenic trail, a modest memorial honors one of the greatest writers of our time.

This wildlife trust is dedicated to orphaned elephant rescue and conservation.

A battle between nature and architecture in the Cambodian jungle.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

This French colonial post office is arguably the grandest in all of Southeast Asia.

This stunning mass of ice spans 121 square miles and is still growing.

Twisted buildings adorn the banks of the Rhine river.

This banal Parisian entranceway is not what it seems.

Try not to get slimed in Tribeca.

Opened in 1956, the first modern indoor shopping mall in the world was inspired by the shopping arcades found in European cities.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

The largest mosque in Germany.