A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

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

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Golden Gate Park's historic collection of plants.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

This turn of the century masterpiece has a mysterious goaty interloper.

Visible below the waves are memorials to the city's Gold Rush dead.

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

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The second oldest continuously operating bar in Louisiana.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

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

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

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

Decades before the scandal, this staircase on the river was a literal "water gate."

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Soaring over the Niagara Whirlpool since 1916.

A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.