This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

New York's southernmost subway station is whimsically wavy.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

The first commercial nuclear power plant constructed on Long Island.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

Even Henry David Thoreau found this glacial pothole irresistible.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Medicinal spa created with the discharge from a geothermal energy plant.

Three columns of volcanic rock shoot out of the ocean.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

This mouldering abandoned mental hospital was once a center for progressive healing.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

This enormous abandoned factory is now a makeshift graffiti gallery.