This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

This demon atop the Notre-Dame de Paris looks utterly bored.

An indoor botanical garden for tropical plants looks like a giant cylinder lying on its side.

The world's longest known cave system.

The romance of early commercial flight still fills this Art Deco destination.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This historic national park is covered in the stunning ruins of red rock pueblos.

This Native American settlement dates back to the Pueblo II period.

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

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.

The 28,000-year-old specimen is remarkably intact.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

In this relatively flat state the highest point is an honored place.

This unassuming passageway played a key role in one of the most important events in U.S. history.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The "lovely red Vega" of the legendary record-settling pilot.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

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

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.