This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

A sculpture for the sun and stars, created by Nancy Holt.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

A gleaming white tower in ornate Indian style soars above the low-slung bungalows of north Tampa.

The history of the traveling carnival is remembered by this sprawling collection of vintage wagons, games, and rides.

Rising from the sea like a stone monster.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

Romans built the world's tallest artificial waterfall in 271 BC.

David Sedaris called it "The greatest shop in the world."

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

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

Drink among marionettes at this pub inside a historic puppet theater.

Lavish royal estate punctuated with heated greenhouses.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

This hidden green space is the city's second largest conservatory.

London's old-school healing garden.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A tongue-in-cheek arcade where the games are based on everyday life.

An Amazonian hotel is the ultimate treehouse and provides stilt based accommodation.

The mystery of Brazil's "Land of Twins" has led to wild theories such as Nazi genetic experiments.

This necropolis is home to eclectic funerary art and is the final resting place for much of the city's nobility.