The only Bahá'í house of worship in North America and one of only a handful worldwide.

An Italian geologic wonder that served as the inspiration for the landscape of Dante's hell.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Italian cave with exceptional acoustics and an unsavory history.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

This astronomical clock is the second oldest in England.

An eerie, derelict amusement park in Berlin.

A tunnel with windows, so you don't miss out on the impressive views.

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

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This building has a giant piercing through one of its corners.

This restored eighth-century palace is a shining example of ancient Umayyad architecture.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

A more chill but no less fascinating version of the famous ancient archeological site.