The mounds at this site were reconstructed with the help of archaeologists and historians.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

These plaques located in a court preserve a small piece of Edinburgh's history.

The Brigadier General was so afraid of being buried alive that he had a buzzer installed in his mausoleum, just in case he woke up.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

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

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

Ruins of an old sugar mill sitting quietly next to a park in rural Florida.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

This ancient Egyptian obelisk still bears the wounds of World War I.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

A lightship turned museum, outfitted with artifacts from the vessel's past as part of the U.S. Lighthouse Service.

A piece of the Ludendorff Bridge, also known as Remagan Bridge, calls this military base home.

One of the Treasury Building's original columns now sits as a garden monument in the middle of a busy military base.

This environmental engineering marvel keeps salt water from the Elizabeth River.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

Train fans from all over flock to this railroad viewing park where three lines converge.