This beautiful and unmissable little museum is full of fascinating artifacts from Mesoamerica's great civilizations.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

It houses the remains of a 17th-century version of the Titanic.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

What looks like a birch tree smushed between two pieces of glass often confounds commuters.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

One of the world's first dedicated bank buildings in the world is now the oldest one.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

An unusual "skull with ears" sits in the crypt of this small church tucked away at the end of a narrow alley.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

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

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

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

This statue is the only female representation of Rome's "talking statues."

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

Elvis's own personal tropical hideaway.