This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

A museum dedicated to the famous Mexican illustrator's iconic calaveras.

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

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

2300-year-old Roman road connecting the empire.

The final resting place of the poets Shelley and Keats.

Breathtaking and huge 430 year old maps of Italy.

A sculpture serving as an homage to Pope John Paul II.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

This 16th-century monastery has been turned into a surrealist architecture compound.

The marshy karst plain has reclaimed this beautiful 17th-century church.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

Romans built the world's tallest artificial waterfall in 271 BC.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.