A close look reveals that the Scottish monument is just slightly off-kilter.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

Georgia's first brewery is also one of its oldest surviving buildings.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

At the time of its completion, it was the tallest dam in the world.

The celebrated eyesore created by starry-eyed sweethearts.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.

How did this lovely seaside English village come by such an unusual name?

A fantastic castle rumored to be the birthplace of King Arthur.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

A popular oddity on display in a stately building, offering a symbolic commentary.