The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Inside this museum, visitors venture through ghost stories entrenched in Icelandic folklore.

Medicinal spa created with the discharge from a geothermal energy plant.

This stunning concert hall has become a symbol of Iceland's national recovery.

This black church sits alone among a field of lava rock.

Dedicated to the god Dionysus, this theatre was used for both musical and theatrical performances.

Monasteries on rock pillars, once accessible only by frayed ropes.

The once highest point in China blends symbolic design with a kick of adrenaline.

An out-of-place slice of France, smack in the middle of Shanghai.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

The Uros people live on floating reed islands in lake Titicaca.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

Amazing views of Long Island Sound can be seen from this mountaintop tower.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

After decades of neglect, a brutalist icon is getting new life as an eco-friendly hotel.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

A once-booming railroad left abandoned next to the Quinnipiac River marshes now intersects with a hiking trail.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.