The highest point in New Jersey is marked by a massive, if simply named, obelisk.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

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

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

A monument celebrating the idea of reaching inaccessible places.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

An underwater statue of Christ blesses the depths off Key Largo.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

Location of a reliquary containing bone fragments of 18 saints.

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

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

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

This kitsch eatery is chock-a-block with bric-a-brac.

Meet manatees face-to-face at this zoo for native species.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

Town of spiritualists and mediums in Florida.

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

A haunted hill that supposedly defied gravity.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

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

A mysterious castle built as a monument to lost love.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.