The ancient tomb acts as a calendar that keeps perfect time.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

A church of bones, decorated with 40,000 human skeletons.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Abstract dinosaur models in London.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

A Neolithic burial site built 1,000 years before Stonehenge.

The remains of Crystal Palace Great Exhibition of 1851.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

A monolithic monument in Greater London.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Most-visited and most-photographed slot canyon in the American Southwest.

Dramatic river bend surrounds a natural red-rocked pedestal.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.