A Barbary Coast watering hole built into a Gold Rush shipwreck.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

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

The remains of a ruined mansion memorialize the 1906 earthquake.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

This Scottish burial tomb once held hundreds of ancient eagle bones.

Enter the world under the hill at this ancient UK burial chamber.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

This famous city eluded concrete detection until the early 2000's.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

A winding path built in secret on the edge of the continent.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

This odd little museum holds exhibits on everything from blacksmith equipment to hair jewelry.

A large instrument played by the wind.

Visible below the waves are memorials to the city's Gold Rush dead.

A huge musical instrument played by the ocean.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

The restored and active Victorian-era final resting place of San Francisco.

A vast city of the dead, where the deceased outnumber the living by more than a million.