A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

The world's brightest bioluminescent bay.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

The world's second largest single-dish radio telescope, once used to contact E.T.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Bat house that has only ever housed bat for one night; they all flew away and never came back.

"We Seceded Where Others Failed."

The island residents are known for taking their quirky sense of humor with them to the grave.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

A monument celebrating the idea of reaching inaccessible places.

A statue honoring 44 continuous years of greeting passing ships.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

An eerie smiling woman looms above the granite tombstones.

Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This North Carolina store preserves a historic moment in America's movement for racial equality.

Art museum based around the collections accumulated over 58 years by one eccentric thrift store owner.

The maritime museum that boasts the largest nautical library in the western hemisphere.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

One tiny triangular park commemorates the victims of a yellow fever epidemic—many of whom are buried right below the grass.