2300-year-old Roman road connecting the empire.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

The Pope’s secret escape route.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Breathtaking and huge 430 year old maps of Italy.

Legend says Dungeons and Dragons players can get their dice blessed at the creator of the game's memorial.

A sculptor's dream castle turned fantastical ruin.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

A museum dedicated to the history and exploration of both popular music and science fiction.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A trash dump made beautiful by nature's power.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

The final resting place of New Orleans' most famous voodoo priestess.

A one-of-a-kind collection of a unique medium.

A giant Troll lurks under one of Seattle's oldest bridges.

Try not to get slimed in Tribeca.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

World's largest collection of serial killer artwork and other macabre exhibits.

The real-life site of Ichabod Crane's infamous gourd attack.

A collection of full-size movie monsters opened to the public.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Pompeii's less famous neighbor is still revealing her secrets.