A 60-room castle constructed by a horse-racing heir.

Mysterious stone tower featured in many alternative histories of the New World.

You can spend the night as an honorary lighthouse keeper in this quaint, historic beacon.

A railroad magnate's replica village has become home to a genetic seed bank for rare breeds of livestock.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

The oldest still-operating tavern in the United States was once owned by a pirate.

The world's smallest drawbridge.

The stone sculpture of an Ottoman soldier is an homage to a lost Providence landmark.

A giant green dragon crawls down from the roof of the Providence Children's Museum.

Rumors of the occult haunt this upscale 1920s hotel.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

The behemoth beasts engaged in an epic battle is the second-tallest statue in the contiguous United States.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

Former villa and estate of James Deering developed to preserve native tropical forests.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

This beautiful Miami garden was designed as a laboratory for tropical plants.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A sharply wedged sundial marks the point at which each day in the United States begins.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

This candy-striped tower is the farthest east you can go in the United States.

Turns out you can see the world without ever leaving Maine.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

The most photographed house in Maine looks good enough to eat.