Hidden on two floors of downtown building, the library has an incredible deal on rent.

It took more than 20 years and a sharp eye for one man to assemble this quirky collection.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

The only presidential monument to display a late POTUS's actual casket.

A record-size collection of wild-haired troll dolls tells the story of the mythical creature's roots in Scandinavian folklore.

Landmark dedicated to the plight of the American Indian in the 21st century.

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

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

New York's oldest magic store.

Incredible sculptures inspired by obscure passages from the Bible.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A snapshot of the city's fascinating voodoo culture.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

Where the "World Pinball Champion” is crowned.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

The final resting place of one of the most iconic musicians of the '80s.

This steamer is known as "The ship that built Cleveland."

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

All that remains of a gigantic earth-moving machine.

Each step is a mere 4 inches tall, said to be measured by the stride of a woman wearing a hobble skirt.

Astounding collection of coin-operated games and automata.