A colorful "forest" made entirely from three tons of recycled plastic waste.

The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.

Where layer cakes tower above one’s head and there is never a shortage of icing.

At a museum of everyday objects, it is the act of collecting that is really on display.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

A quirky and charming restaurant founded by artists.

Diego Rivera's massive tiled fountain and failed infrastructure project.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Frida Kahlo's childhood home, now a museum of her life and works.

China's very own Atlantis is an ornate dynastic city resting at the bottom of a lake.

Tubing through a cave lit with glowworms is a magical underground experience.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The abandoned hospital whose elaborate ghost stories cover up the dirty truth - an uneventful sanitation issue and other mundane reasons for its demise.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The remains of diamond fever taken over by the desert.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

Once the most densely populated place in the world, this island is now a ghost town.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

The largest catacomb system in the world.

This attraction was abandoned after the Chernobyl disaster.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."