Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Venice's "Island of the Mad."

The glowing blue Nymphaeum of Emperor Tiberius.

Geothermal waterfalls in Tuscany.

Thousands of well-dressed mummies below a monastery.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

This 1st-century CE Roman bath sits under a carpark.

This trail was once used to smuggle cigarettes, sugar, and other black market goods between Italy and Switzerland.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

On the shores of Lake Garda, the ruins of a Roman villa that allegedly belonged to the poet Catullus.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Japan's largest area of "pink moss" turns the hillside bright pink every spring.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

This landmark cemetery in Boston was created more than 300 years ago.

This popular Boston haunt is reminiscent of a time gone by, when slow cafes and sweet-smelling smoke wafting from patios was the norm.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

This historic patch of real estate offers a glimpse of colonial Boston.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

These items are all that remain from the room used by the author during his second tour of the U.S.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.