Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

Within this lovely Richmond cemetery lie the remains of famous Virginians and some of Edgar Allan Poe's most beloved family and friends.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

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

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

A medieval fresco which reminds visitors that death will come for us all.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

During World War II, this rice mill became a Nazi concentration camp.

The oldest of Venice's plague quarantine stations, designed to keep the medieval city safe from disease.

Venice's "Island of the Mad."

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

This zoological museum began as the first great curiosity cabinet.

Anatomical cabinet holds unexpected treasures.

This museum is rotten with a century of wax medical deformities.

The largest and most famous wax anatomical collection anywhere in the world.

Abandoned cemetery of the former Psychiatric Hospital of Volterra.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

Eighteen mummies have stood guard behind the altar of this tiny church since 1833.