This natural sea arch highlights Ireland's rugged coastal beauty.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

Rare pigmented engravings cover the walls of this Stone Age shelter.

Bizarre dirt trail winds a narrow path above the tree line.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

The ridged layers that make up this river canyon represent Earth's geological history.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

A room filled with frescos that make it seem like the walls are crumbling down while giants die in despair.

Dozens of large-scale, creative, evocative curios from prominent artists dot the calm outdoor space around this major museum.

This five-foot-tall bronze bird is a memorial to a species that was hunted out of existence.

This museum in the tower of the oldest church in Gdańsk, is home to centuries-old time-keeping devices and the world's first pulsar clock.

This ramshackle ghost town is comprised of mining-era buildings collected from around the region.

An unexpected curiosity cabinet hidden within a department store in the Japan Post tower.

"Polynesia on the Plains."

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

An architectural gem nestled into a promontory overlooking a prehistoric landscape.

Perhaps the most spectacular grotto along the Algarve coastline.

The frozen treats at this Cape Town parlor are inspired by Africa's food cultures.

An indigenous ethnobotanist runs this brunch spot celebrating Australia’s native flavors.

A cool dive bar, off the beaten track.

A beautiful memorial tells the story of a formerly enslaved woman whose kindness shaped a burgeoning city.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

This castle played host to the largest great hall found in medieval Central Europe.