This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

A collection cataloguing one of the most brutal dictatorships in modern history.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

This giant underground cave chamber can only be accessed through a small opening at the top.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

This centuries-old pueblo church houses the body of a Franciscan friar who is said to be a rare "incorruptible" corpse.

A grotto replicating one of the world's most famed Marian apparitions sits across the ocean from the original.

Sweden's oldest animated sign is still lighting up the skyline today.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

This historic lavatory leftover features two levels of defecation stations completely without context.

Some islands... they come, they go, especially on Lake Travis.

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

This burial pyramid in central Ireland is thousands of miles and thousands of years away from its Egyptian inspiration.

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

The longest trolleybus route in the world, from Simferopol and Yalta.

This graveyard is the eternal home of the residents of a vanished California town.

One man's dream has turned into this naturally growing chapel made of almost nothing but trees.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.