100-year-old shipwreck you can walk up to at low tide.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

This haunting monument honors the victims of 9/11.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Try not to get slimed in Tribeca.

Native Americans built this circle of stones, which was used to predict astronomical events.

An entire town preserved as a historic landmark.

Free public park and gardens filled with peacocks and peahens.

These boots are made for selfies.

Over 100 million years ago, beach-bound dinosaurs left permanent marks on San Antonio's landscape.

Three hundred years of preserved Spanish colonial history in San Antonio.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

A stunning landscape of bunkers that once stored chemical weapons.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

This bare tree might not have leaves but it is constantly clothed in festive decorations left by mysterious local benefactors.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

The steepest tramway in North America provides stunning views of the out-of-the-way Wallowa Mountains in northeastern Oregon.