A former copper mine which became a truly unsuccessful prison.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Celebrating an art form with a collection of puppets from all over the world.

Memorial to one of the most fatal fires in both circus and U.S. history.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.

Final resting place of a New Haven urban legend.

The cave where two British judges hid in exile after sentencing the king to death.

The headquarters of the famous Yale society.

Connecticut grave of the woman responsible for the Winchester Mystery House in California.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

Dothan, Alabama has been invaded by scores of anthropomorphic peanuts.

This ghost town houses the remains of Alabama's old state capital.

148 feet long and in the middle of a verdant forest.

A mysterious inscription may hold a clue about the "Lost Colony" of Roanoke.

FDR hoped to find a cure for polio in this Georgia town's warm springs.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

This stone is a marker of one millionaire's personal vendetta against gravity.

This 13-foot smiling peanut in Georgia helped Jimmy Carter win the 1976 presidential election.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.