A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A vertically floating hemlock controls the waves and weather at Crater Lake.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

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

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

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

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

Cliffside houses provide a spectacular view from their perch above the valley.

The earliest known map to show America, discovered by accident at a Paris bookshop.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

An ancient Egyptian temple in the middle of Madrid, Spain.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of Paul Revere's historic two lantern warning.