The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

Giant animal sculptures are created with the rice straw leftover from the fall harvest each year.

Norway has built what may be the world's most beautiful public toilet.

A unique tribute to the millions of animals who served and died for the British military.

A painfully obvious spy house sits right across the street from the Russian Embassy.

World's first "penitentiary," meant to be humane, drove men insane.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Cathedral carved out of salt, located a mile below the earth's surface.

The attic of a four-century-old canal house hides a clandestine church.

Old Danish castle immortalized in Shakespeare's Hamlet.

People escaping slavery may have hidden inside a corpse vault.

This tangled English forest looks like something right out of a fairytale.

A whimsical village of unique treehouses resides in a Washington forest.

One of the oldest living oak trees in the Southeast.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A collection of abandoned typographic signs from Berlin and beyond.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

A massive Celtic cross secretly growing in an Irish forest.

A technicolor place of worship for Elevationists.

The largest greenhouse in the world is home to over one million types of plants.

Walk into the 19th century without leaving Brooklyn.