The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A museum dedicated to the history and exploration of both popular music and science fiction.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

Moscow's imposing monument to the Space Age.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Metal sculpture folk art lining the Kansas Highway.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

Also known as the Cathedral of the Plains, this church holds the distinction of being one of the "8 Wonders of Kansas."

Journey up the capitol building's cupola for an amazing view of Topeka.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

Lone survivor from Custer's Last Stand forever preserved.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

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

These unusual rooms on wheels are holdovers from the 1960s.

There’s a special club house at the top for the bell ringers.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

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.

Home to a vast and influential collection of Shakespeareana.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

Go take a picture with the inventor of the daguerreotype photographic process.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.