With some 500,000 books across five buildings, this bookstore is a reader's paradise.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Underground tunnels remain beneath this abandoned mental asylum.

The kind of mixed-up place that drives archaeologists crazy.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

A cave dug by a man directed by ghosts to find pirate treasure.

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

"The House That Love Built" is shying away from "The House That Ghosts Love."

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

A small museum dedicated to the whimsical tool that turns sugar cookies into works of art.

A mysterious light of unknown origin on the backroads of Missouri.

The Ozarks' strangest dwelling.

This century-old roadside attraction is full of bizarre rock formations.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

Beautiful steampunk ghosts of early Massachusetts.

These eerie outliers of the lightning bug family glow a mysterious blue color.

At 238 feet above the bottom of a gorge this span is known as the biggest thrill on the road to McCarthy.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

The ruins of this Alaska gold mine form a gorgeous ghost town.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

Gorgeous cave resemble a winter wonderland.