This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Monkeys inhabit the lush forest surrounding ancient Mayan ruins once considered sacred.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

A collection of heirloom roses tucked in a spectacularly beautiful botanical garden on Lake Atitlan.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

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

The largest freshwater lake in the Florida Keys.

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

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

"We Seceded Where Others Failed."

A monument celebrating the idea of reaching inaccessible places.

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

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A much more welcome kind of snowbird vacationer, manatees camp out in these springs every winter.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.