A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

The modern birthplace of Irish freedom.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The ancient tomb acts as a calendar that keeps perfect time.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

A store that sells all manner of bones, insects, and animal curiosities.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

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

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Home to one of the world’s largest collections of model yachts.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The remains of a ruined mansion memorialize the 1906 earthquake.

A monumental cross hides in the trees in Golden Gate Park.

A monument to the love people have for their pets.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Golden Gate Park's historic collection of plants.

A collection of 20th-century automata, penny arcade games, and musical contraptions.