The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Enormous lake at the bottom of a unique cave system.

The famous aviator's final resting place is a study in natural beauty.

A unique set of caves that spits waves back out into the ocean.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

This black shoreline is made up of exploded lava particles.

Part taxidermy workshop, part natural history museum this Michigan destination shows off its dead animals and helps you mount your own.

One of the largest crucifixes in the world stands 55 feet tall in a secluded, wooded area of northern Michigan.

Taxidermy and miniatures come together to create this unique museum.

The park is home to the United States's only still-operating Dutch windmill.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

Unique Michigan homes look like something out of Tolkien's "The Lord of the Rings."

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

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

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

Even with its slightly risible name this colossal cross is still able to inspire awe.

The study has wall paneling from a 17th century ship.

This lush 12-acre site was once named the finest Japanese garden in North America.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

This cemetery is all that remains of a school for "wayward" girls.