Memorializing an American tragedy of massive proportions.

Steepest flood safety railway in the entire world.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

World's first "penitentiary," meant to be humane, drove men insane.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

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

A monument celebrating the idea of reaching inaccessible places.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

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

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

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

A historic presidential getaway on the continental United States' southernmost island.

The oldest working mechanical clock in the world.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

The land is home to swimming ponies and a legendary 18th-century treasure.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.