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

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Have fun at the world's first Buddhist waterslide park.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

This World War I fortress is the perfect place to catch a Montenegrin sunset.

A curious cave church carved into the face of a cliff.

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

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

This historic cemetery was inaccessible for several years due to dozens of land mines.

A gift from the Soviet Union in the 1980s, this is the only statue of the Soviet dictator in Southeast Asia.

Walk through a clothing store, across a courtyard, and up several flights of stairs for delicious coffee with a side of beautiful views.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

The spot where the two men ate together now stands enclosed in glass.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.