Iran's colorful terraces are a rare geological masterpiece.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

Three sinkholes filled with warm, crystal-clear water reached by a horse-driven cart on an old train track through the jungle.

This stunning mountain lake was named for a pair of tragic lovers whose statues stand at the center.

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

This Parisian café sticks almost exclusively to an ethos of reuse.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

A kaleidoscopic warehouse-maze of handmade neon signs.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

A one-of-a-kind collection of a unique medium.

Centuries-old bridges grown from tangled roots.

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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Haunted house kitsch meets Japanese folklore at this theme bar where patrons can “die” and have their own mock funeral.

A tiny collection of traditional Japanese woodblock prints, open only when the owner feels like it.

Avant garde house of Pierre Cardin on the Cote d’Azur.

Where better to stay the night than inside a trio of ancient Chinese deities representing "the good life."

A rare, flower-shaped example of Brutalist architecture in Switzerland.