A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

Commonly acknowledged as the only public monument to the Devil himself.

Two large posteriors in one giant statue.

Giant topiary dog once played a role in a terrorist bomb plot.

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

Ancient barriers wrap around what was once an important stop along the Silk Road.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

The profile of one ill-fated deacon was emblazoned forever on this church window during the Halifax explosion.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

A stunning Victorian abbey and walled garden on a lakefront.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

Known as "Toronto's Flatiron."

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

One of the largest underground systems runs under Canada's largest urban center.