Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

One of the first intercontinental ballistic missile sites in the United States.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

This impressive working clock made of 16,000 plants changes its flowers twice a year.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

This location holds the truth to what truly happened that faithful night.

The Boston square dedicated to the dark poet who was born nearby.

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.

The natural hot spring that was integral to the creation of Canada's first national park.

Though many were skeptical at first, these animal-specific routes across the Trans-Canada Highway have been a major conservation success.

Take a hike to this remote, scenic tea stop in the Canadian Rockies.

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

Spectacular views await visitors to this lake.

A majestic hotel that also stands as a historic relic.

Drink a Guinness under the wings of Reagan's retired Air Force One in his presidential library.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

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

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

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

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

Three bronze deer sculptures relax along the Scioto Mile.

60 feet of towering steel balances gracefully.

The sun acts as a key that only fits this giant keyhole twice a year.