One of the last Art Deco gas station still standing in Dallas.

Inside this historical home are two panoramic murals of Sydney Harbour and Edinburgh.

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

Everyone from Alan Ginsberg to The Rolling Stones has stopped by this classic dive bar.

A classic mystery spot complete with spots that are said to make you shrink or grow when you stand on them.

A vaudeville performer mounted this hollowed-out redwood log onto the chassis of a truck, and toured the country spreading a message of conservation.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

This massive redwood tree has a hole in the base big enough to drive through.

A grove of "candelabra redwoods" deep in California's Lost Coast.

Though nicknamed the “Russian Freighter,” this ship was actually sunk off the coast of Pensacola by the U.S. government in a top-secret operation.

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

This 140-year-old beacon off the Florida Keys marks the wreck of a Navy ship that once roamed the Caribbean hunting pirates.

Meet manatees face-to-face at this zoo for native species.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Once the primary source of ice in this region during the mid-20th century.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

A historic dam made famous for its turbines and feature in a Hollywood classic.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.