A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

A historic neighborhood church is reborn as a psychedelic arts collective.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

A hugely vast Irish landscape of barren rock that stretches for miles.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

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

One of Ireland's most infamous prisons for rebels including men, women and children.

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

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