Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

A giant time capsule not scheduled to be cored until 2040.

An 18th-century lighthouse built on a 16th-century castle is now a monument to the maritime beacons of Scotland.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The final resting place of soldiers' loyal canine companions.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

The heads of two giant mythological water horses honor Scotland's horselord past.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

This little slice of old Jerusalem in Oklahoma is the evolution of a 90 year old passion play.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

A collection of massive stacked rocks in Texas includes a snarky note on the benefits of modern technology.

The highest point in Texas is capped by a big silver pyramid.

The only international border marker within the United States.

The second largest roadrunner in the world stands 11 feet tall in his West Texas town.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

Ornate, dome-topped cenotaphs fill this royal crematorium.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

The world's second-largest sundial, made entirely out of stone.

Witness to many historic moments in early Texas history.

On a dusty county road sit the ruins of a ghost town's abandoned church.