One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The atmospheric road was never meant to be so creepy.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

One of the largest, oldest, darkest, quietest motel rooms in the world.

Puzzles within puzzles hide a golden treasure in this hedge maze.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

360° views of the city plus five floors of optical illusions and hands-on science.

Artistic cabins actually grow deep in the Canadian wilderness.

Bioluminescent firefly squid light up this Japanese fishing port.

A humid oasis combines recreation with exploration in a unique underwater cavern.

A modern English garden of eccentric beasts, follies, and oddities.

These azure waters were thought to lead to the Mayan Underworld.

A surreal museum of extraordinary industrial objects.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

For those with no fear of heights: a skywalk 4,700 feet up on a Chinese mountain.

One man's desire to transcend art led to the construction of this outsider chapel.

San Francisco's newly reopened hands-on science museum.

This lab's maddening silence is good for business but bad for sanity.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

A layered tribute to the work of mosaicist Isaiah Zagar.

270 million year-old forest of stone.

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