This grove was planted more than a century ago by the War Mothers of World War I.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

An eerie, decaying ghost town destined to fade into the forest.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

The U.S. Fish Commission’s effort to mass produce carp.

The national park was once a plantation estate.

A mysteriously abandoned campsite in San Angelo State Park.

Legend says the horned lizard spent 31 years sealed in a time capsule before he was discovered alive.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

Submerged lava formations create incredible waterworks.

This former luxury resort in Kaua'i is now an abandoned relic.

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

This blowhole is supposedly caused by a trapped monster.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

This monument built by Japanese American immigrants spent decades underground.

The oldest standing structure in downtown San Diego.

The tiniest tiki room in San Diego.

Lemon Grove, California is known for its giant lemon...and mummified bodies.

This historic graveyard was partially paved over to create a streetcar line.

The classic Atari game's iconic aliens have invaded downtown San Diego.

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.