Where manatees are the snowbird vacationers in these balmy Florida springs.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

A mysterious castle built as a monument to lost love.

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

An underwater city for the dead.

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

This simple, broken column marks the final resting place of one of America's most famous explorers.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

Live long and prosper in Tennessee.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Walk the whole Mississippi River!

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Home of an evil witch famous within southern folklore.

Enormous lake at the bottom of a unique cave system.

All that's left of the quintessential "cabin in the woods."

A tiny memorial for the year the Connecticut River almost destroyed New England.

These etchings reveal the history of a long-gone quarantine site.

The final resting place of one member of the Amistad slave revolt who never made it back home.

An abandoned Depression-era zoo hidden just off the highway.

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

A wunderkammer hidden on the top floor of the Hartford statehouse.