This museum celebrates a legendary railroad photographer whose personal life was as dramatic as his photos.

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

This free museum is building a collection of books that are banned, censored or burnt around the world.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

A hidden gem full of oddities, curiosities and macabre antiques.

Hidden underground, a remarkable 10th-century bath complex survives virtually unaltered.

In this 400-year-old hotel in Madrid, you'll find a comb in every room, an old clock, and maybe a ghost.

These 100-year-old tunnels in downtown Provo house artists, restaurants, and a few surprises.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

This 19th-century shopping arcade has charming, unusual stores like a luthier workshop and even the local Esperanto Association.

This museum-within-a-museum pays tribute to "The World's Most Experienced Airline."

This small museum houses rare airplanes from aviation's golden age.

The last funhouse of its kind, where guests enter through the mouth of an 80-year-old blue whale.

The longest navigable underground river in the United States is home to countless blind and albino animals.

This jail which was in service for over a century is now open for curious visitors.

A unique sculpture designed to raise stroke awareness.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

Medical history museum featuring a lovely doctor's office from the 1800s.

One man's collection of found art, sculpture, and ephemera adorns his two side-by-side homes.

A museum specifically dedicated to the Trabant, one of the iconic automobiles of the GDR.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.