Stone Age solar temple is aligned with the sun on each equinox and solstice.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

The ghost town where the villagers refuse to leave.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

This one has sailed five times as far as Sir Francis Drake's famous ship.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

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

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

A saintly relic hidden in a Prague church basement.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The man who gave his name to magnetic measurement is buried in the city where he did his best work.

A 1:2 billion-scale solar system leads visitors into this German university town.

The Goose Girl of Göttingen, Germany might well be the most kissed girl in the world.