One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

Filled with history, this cemetery is maintained each summer by a few hungry goats.

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Oldest existing wire suspension bridge in the United States.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

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

A building so large that it has its own weather.

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

Mariners once used this prehistoric landfill as a navigational landmark.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

A local road runs around a memorial to a teenager who died in 1860.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

St. Augustine's record-setting narrow street was designed to protect against pirates.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

A lion given to the prime minister somehow got stuffed and sent to Florida.

Possibly the world's oldest rug, this Egyptian relic is woven entirely from ancient cat hair and once carried a mummified human foot.