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

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.

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

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

A Roman holiday is closer than you think when you use this 1916 staircase inspired by Rome's Piazza di Spagna.

Tacoma's historic Beaux-Arts train station is now a federal courthouse featuring large-scale glass sculptures by artist Dale Chihuly.

Entering this curiosity shop is like stepping into a mad scientist's lab.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

An isolated dive site teeming with cnidarians.

A crystal clear beach surrounded by beautiful coral reefs.

In ancient times, these fallen standing stones supported a massive house.

The pits used to load the nuclear bombs onto the aircraft that dropped them over Hiroshima and Nagasaki at the end of World War II.

An abandoned lighthouse off the beaten path, one of the few surviving pre-World War II Japanese structures, offers a beautiful view.

Once a popular hangout spot this huge mall was left to ruin after economic crash.

A gorgeous gem on the ocean.

Where hundreds of Japanese civilians committed suicide to avoid being captured by American soldiers during WWII.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?