Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

This roadside wonder is as mysterious as it is beloved.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Elaborate tile work in this railway station tells the story of Portugal.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The only surviving fragment of the lost Narragansett Pier Casino.

A castle on a hill once named "the most beautiful high school in Massachusetts."

The sea urchin sculpture is an unusual commemoration of a New England town's seafaring history.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

The oldest continuously occupied public building in the United States.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

This restaurant serves wood-fired fare served in a natural cave with a live spring.

An extravagant western hotel where every floor is the "ground floor."

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

The largest spring in Northwest Arkansas is also home to a sprawling botanical gardens and a historically significant bluff.