Law-protected wreckage serves as a peculiar memorial for an almost forgotten World War II tragedy.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

This abandoned sea fort has become an accidental bird sanctuary.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

A mysterious spirit totem at the edge of Navajo lands.

This underwater old Texas hill town only resurfaces during harsh drought.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

The most isolated mailbox in America lets desert travelers record their passing.

This ghost town was once a cult-like religious utopian settlement.

Three hundred years of preserved Spanish colonial history in San Antonio.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

Developers built a Walmart around one family's plot and constructed a mausoleum in the parking lot.

A downtown park built on top of unclaimed graves.

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

Bits and pieces from the ill-fated Donner Party's winter cabins.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

This overgrown Illinois water park offers a whole new type of adventure.