Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

The first artificial white water river course in North America cuts right through an Indiana city.

A memorial dedicated to the victims of the Columbine High School shootings.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

Community bookshelf of 25-foot-tall book spines.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Largest Roman Catholic church in North America.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

A maritime museum holding the remains of Blackbeard's pirate ship.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The second oldest continuously operating bar in Louisiana.

A snapshot of the city's fascinating voodoo culture.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

I-95's Tijuana-style celebration of kitsch at the Carolina border.