The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

Roman ruins top white travertine terraces formed by ancient hot springs.

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

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

A small Richmond island dotted with the remnants of hundreds of years of history.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

Meet manatees face-to-face at this zoo for native species.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

A tribute to Ponce de Leon's supposed quest for eternal youth.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

A treasure hunter's tiny bar, harboring celebrities since 1959.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

Hidden dwellings in the cliffsides of North Togo used by local Moba tribes to evade 18th-century slave traders.

Death rituals and sacrifice inside a Peruvian megalith.

A cemetery housing wild west legends in South Dakota.