Concrete strongholds stand guard over the Golden Gate.

The second oldest continuously operating bar in Louisiana.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

If New Orleans is the birthplace of the "cocktail," why does their own museum of cocktail memorabilia beg to differ?

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

FDR's Art Deco hospital tower was hopelessly inefficient.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

Death rituals and sacrifice inside a Peruvian megalith.

Sleep in a glass pod dangling off a cliff.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The most accurate timepiece in the world.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

She stares out across six lanes of traffic, clutching a musket and infant with determination.

Fittingly, America's museum of architecture is itself a magnificently designed old building.