The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

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

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

Seat of the Duke and Duchess of Devonshire for centuries.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

Catacombs turned marketplace.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

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

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Ship-sized kinetic sculptural fantasy.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

It was once the base for a series of domestic terror attacks.

The "lovely red Vega" of the legendary record-settling pilot.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The most decorated dog of World War I is preserved in the Smithsonian.

A nostalgic bibliographic gem.

Elevated freight railway turned wildly successful urban park.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.