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

Along the most northwestern point in Africa is an ancient cave surrounded by legends.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Notorious artist squat renovated into legal studios.

A giant Troll lurks under one of Seattle's oldest bridges.

Cat art as far as the eye can see.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Dramatic river bend surrounds a natural red-rocked pedestal.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The world's only museum devoted to the wonders of fluorescence.

These fantastically named natural pools look like something out of a Scottish myth.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

This oceanside Reykjavik spot is speckled with recycled sculptures and large stones.