A layered tribute to the work of mosaicist Isaiah Zagar.

Where America's first doomsday cult awaited the end of the world.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This unassuming riverbank is Missouri’s first designated site in the National Underground Railroad Network to Freedom.

Enormous small-business mecca in the Midwest, serving dozens of artists.

The world’s largest Masonic temple was saved by the White Stripes.

This sprawling bookstore spans four floors and has more than a million books in stock.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

This secluded walking trail is a hidden gem of a Pittsburgh park.

This little museum in the town where zombies were born celebrates the living dead.

The Pennsylvania shopping center was once the setting for the 1978 film, "Dawn of the Dead."

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

An old dining hall now serves up ghost stories for lusty locals.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

A showcase of geologic history is home to one of the largest collection of lunar meteorites on Earth.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

On a side street near the interstate is the building where the famous anarchist once owned an ice cream parlor.

The headquarters in Salem doubles as an occult art gallery.

The Burnside Fountain and its questionable interpretation.

Designed as a place for patients to take in the scenery, this tower has a dark history.

This quaint New Jersey graveyard is an eternal resting place for thousands of beloved pets.

A hidden alley in urban Baltimore is a haven for graffiti artists.