This small park features a monumental fountain wall, providing a great photo opportunity in the middle of Houston.

The helicopter that "Tricky Dick" absconded from the White House in on his last day in office.

What was once a summer home next to a waterfall has now become littered with graffiti and children in swimsuits.

From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

Though it's no longer a functioning train depot, this castle-like structure is an important piece of Oklahoma history.

The United States' first transcontinental automobile road came to its end at this spot in San Francisco's Lincoln Park.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

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

An entire subdivision was accidentally built on a flood plain, resulting in its eventual demolition—but the streets are still there.

One of the first skyscrapers in Santa Monica, and a famous getaway for the Hollywood elite of then and now.

This well-traveled chess park offers scenic views of the pacific and a colorful, eclectic clientele.

Giant origami crease patterns engraved in Santa Monica intersections may even be visible from space.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

A second generation sun-powered marvel lights up the night.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

People of the Plum Bayou culture built these enormous mounds over 1,000 years ago.

Once seen as a bit of an eyesore, this sculpture has become a staple of downtown Houston.

This mill has survived a tumultuous past to still produce flour and cornmeal.

A small museum dedicated to the whimsical tool that turns sugar cookies into works of art.

The only remaining sod house Oklahoma built by a homesteader in 1894.

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

For decades these polar bears have roamed all around a Nashville neighborhood.

This church houses the “incorrupt” body of its founding Bishop.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.