A quarter mile off the coastal tip of Maine you'll find the "Beloved Island" of Franklin Delano Roosevelt.

As communication goes completely wireless, this Maine museum remembers all the wires that got us to this point.

World's first "penitentiary," meant to be humane, drove men insane.

A newspaper editor turned this abandoned island into a tortoise nature preserve that's now the world's smallest national park.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This once luxurious Catskills resort is now a haunting ruin.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

An urban forest overtakes what was the greatest failure of utopic urban housing.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

An abandoned stretch of highway, deteriorating next to the operational one.

A toxic ghost town sitting atop a massive coal fire.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

A seemingly endless landscape of pure salt stretches far across Bolivia.

A massive underwater sinkhole made famous by Jacques Cousteau.

An operating lighthouse from the 1860s.

This expansive bridge in the Canadian wilderness was originally just built for friends.