Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

Once America's tallest structure, now a Baltimore landmark.

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

Bad farming practices caused this unnatural natural wonder.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

"We Seceded Where Others Failed."

A building so large that it has its own weather.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

A Circus legend leaves an unexpected endowment.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

Just below the surface, shrimp are producing temperatures hotter than the sun.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

The largest retailer of seashells in the world.

In a city crazy for seashells this museum educates and amazes visitors using the wonder of cast-off exoskeletons.

Former utopian colony based on the belief that the universe exists in a hollow sphere.