A museum devoted entirely to the rattlesnakes and snake-related art.

Surreal riveted sea forts once protected the Kent shores from German attack.

This foolish Victorian sea fort was converted to a deluxe hotel.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

Odd stone and concrete monuments in the "Poet of the Sierras" eclectic folly garden.

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

A retired tobacco farmer's pet project turned into a sturdy miniature city.

This Denmark theme park is part family attraction, part experimental archaeology project.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

This black shoreline is made up of exploded lava particles.

As state high-points-by-elevation go this spot is one of the lowest, but for years it was also the hardest to climb.

This massive water spout has been luring visitors for hundreds of years, some to their death.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

A working miniature city designed to teach kids about safety and presumably city planning.

Ecuador's largest Incan ruins show evidence of sophisticated irrigation and diplomacy among the ancient builders.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

A once great mansion stands in stately ruin.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.