A luxuriant botanical garden below sea level.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

This home is decked out like a psychedelic explosion of colors and bowling balls.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

An underwater city for the dead.

Amelia Island’s oldest independent bookstore is a cozy oasis for literary exploration.

A tribute to the riders who bridged East and West.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A burial vault located under Tiber Island in the middle of the Italian capital.

This is the oldest Roman-made bridge in the city still existing in its original state.

This curious, round temple is the oldest still-standing marble building in Rome.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This ancient market is often referred to as the oldest shopping mall in the world.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

A huge enchanting public park just outside the ancient walls of Rome.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.