The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

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

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

A hidden beach at the end of a tunnel of mangrove trees.

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

An experimental forest at the foreground of arboreal science is also the canary in the coal mine for climate change.

This remote research station sits amid the second-largest ice sheet on the planet.

This historic furnace was once used to produce cannonballs during the Civil War.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Steepest flood safety railway in the entire world.

A glass and sculpture wonderland forms an oasis in a remote part of Kenya.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

A larger than life statue of a steelworker keeps watch over a closed steel mill.

A storybook church made from a mesmerizing medley of multi-colored stones.

After covering almost 1.5 billion acres, the survey's still not finished.

A Swiss man built this airstrip for aliens because a UFO captain telepathically told him to.

The site of a mysterious pony massacre is rich with extraterrestrial conspiracy theories.

The former Naval shipyard is open for exploring - mostly.

The modern birthplace of Irish freedom.

This strange pyramid is a unique feature of the Austrått Manor.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

Known as the "Fat Man of Maldon," Bright was a larger-than-life figure.

Rare and wonderfully wormy cadaver art captured in brass for centuries.

The first archaeological site discovered by aerial photography.