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

This unreal Portuguese palace looks as though it's made from a pile of different castles.

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

The United States Capitol's former columns still stand.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

The national park was once a plantation estate.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Washington's iconic carousel has a nice piece of Civil Rights history.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

There’s a hidden military meme engraved on the World War II Memorial.

A much-maligned monument to teetotalism.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Perhaps the most scandalous statue of America's first president.

This small interfaith chapel lies not far from the rim of the Grand Canyon.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

This taxidermic smorgasbord was co-created by an artist poached from the Museum of Natural History.

Vice President Humphrey's final resting place is tucked away in this cemetery along with a few other notable figures.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

This old residential building was once the largest flour mill in the world.

The only arched bridge made of stone on the entire Mississippi River.