The world's second largest salt mine, said to have been discovered by Alexander the Great's horse.

These stairs were built to accommodate royals mounted on elephants.

A 17th-century mosque that was used for war more than worship.

On the Pakistan-India border the militaries perform an elaborate theater of aggression each and every night.

This peaceful Sikh gurudwara serves around 50,000 free meals every day within its gilded walls.

An unassuming tomb houses an important milestone in Indian architectural history.

An ancient iron pillar in Delhi that seems to be rustproof.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

Time stands still at this serene burial ground in the center of Budapest.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

The oldest private art gallery in all of Hungary.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Museum dedicated to the terror regimes of Hungary.

Electrical curiosity museum housed in an old transformer station.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.