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

Architectureal fantasy quarter of Rome.

This Neolithic passage tomb forms part of a World Heritage Site.

The modern birthplace of Irish freedom.

A remarkably intact castle that once was the largest in Ireland.

Experience what life was like in Ireland during the Viking and medieval ages.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

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

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

This bridge was constructed from the rubble of the infamous Bastille.

This demon atop the Notre-Dame de Paris looks utterly bored.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

France's most famous cemetery, with some of its most curious tombs.

One of Mexico's youngest major cities still holds on to this structure representing its short modern history.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.