Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

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

This chilly Canadian hotel has a four-month lifespan due to the unusual material it's made of.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Intensely colorful calcite pools in Southern China.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Copenhagen's celebrated theme park and gardens.

This Scottish bridge seems to compel dogs to leap to their death.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

"The most colorful grottoes of the world.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

This modern monument to pagan belief looks like it was transported straight from ancient times.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Not one, not two, but three natural bridges remain in this captivating spot post-sinkhole.

Stroll the grounds built by murder, suicide, and dirty oil money at one of Hollywood's most filmed mansions.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Climb right into the heart of this colorful Iceland volcano.

This free, take-a-book shop seems like a trick but isn't.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.