Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

This statue has a painful history, but activists have since recontextualized it as a way to educate visitors about the dangers posed by fascist regimes.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

This ancient fort has been a great insight into the Roman presence in the region.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

An ancient Egyptian temple in the middle of Madrid, Spain.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

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

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

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

A brutalist gem towering over the heart of Milan.

This snug medieval lane is one of the narrowest streets in the world.

Packed to the ceiling with antique taxidermy and hunting arms.