This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

This Gothic castle was inspired by Erik the Red's Viking residence at Brattahlid in Greenland.

The East Village tenement from the cover of Led Zeppelin’s 1975 album has a tea shop on the ground floor.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

One of the tallest mountains in India was closed for years after a botched CIA mission.

These ruins once flourished as the capital of the Lydian kingdom, often credited with the invention of metal coinage.

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This natural wonder is disappearing at an alarming rate.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

The deepest hole drilled in the name of science, where evidence of Precambrian life was found.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

This aluminum “stairway to heaven” has impaled at least a couple of birds.

An underwater temple submerged for 20 years has resurfaced with an extreme drought.

A controversial blue hoop has been puzzling freeway drivers since 2013.

According to a local legend, this bridge was constructed by an astrologer with the help of the devil.

A secluded fortress from the days of the Crusades that offers breathtaking views.

Natural time capsule containing an alien ecosystem.

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

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

A winding, blood-red tunnel of hardened lava navigable by foot.