A volcanic fissure over two miles long and up to 70 feet deep.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

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

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

This magnificent, quirky home sits atop a literal gold mine in the middle of the Nevada desert.

This rustic old building is said to be the most photographed barn in America.

This mining town boomed in the Atomic Age when uranium was gold, only to be abandoned when the industry collapsed.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The centuries-old trees are draped with Spanish moss to make them look like wizened elders.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

A perilous medieval road leading right into the sea.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

Not far from Mount Rainer, an iron wonderland claims the landscape.

A comprehensive collection of bonsai set in a beautiful campus.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

The little-known second castle that William the Conqueror built in York.

An old world fairytale-land with over 350 fairy folk figurines hidden amongst 800 year old cedars.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

Private collection of art inspired by cabinets of curiosity.

An emporium for the weird, creepy, rare, and just plain gross.

World's only nuclear reactor operated by liberal arts undergraduates.