Shop the world's largest number of ice cream flavors, ranging from delightful to downright bizarre.

A massive underwater sinkhole made famous by Jacques Cousteau.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

This hotel is located on the edge of the world's largest salt flat and is made out of the only material around.

Abandoned bull fighting ring, slowly falling apart in Uruguay.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

A wall of chewing gum moonlights as collective art.

Traditional 11th-century outdoor tannery.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

A marvel of Byzantine engineering under the streets of Istanbul.

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

An exquisite collection of fairytale conveyances that puts most car museums to shame.

A saintly relic hidden in a Prague church basement.

The only theatre in the world constructed specifically for sound movement.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A hand-built folk art installation covered with messages of God's love.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

Founded as a refugee camp, now a popular tourist spot.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

The king of U.S. high points towers over every other peak on the continent.