A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

Eighteen miniature death-scene dioramas.

Once America's tallest structure, now a Baltimore landmark.

A hidden alley in urban Baltimore is a haven for graffiti artists.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

An astounding collection of medical specimens, including bits of President Lincoln.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

After hundreds of years of settlement, this once-bustling fishing village sunk into the Chesapeake Bay.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

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

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The middle finger of modernity.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This controversial museum includes such detested exhibits as a chocolate suicide bomber and fecal-smelling digestion machine.

This grave in a ghost town cemetery marks the death of a witch on a day that never happened.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

This miniature take on the Kremlin is one Dutch man's retirement project.

Most complete collection of Gymnosperms in the world.

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."