An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A marvel of Byzantine engineering under the streets of Istanbul.

A fountain standing as a testament to a doomed alliance.

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

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

The silly symbol for an underground protest group is now scattered around the city.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

This magnificent Crimean estate was once a playground of the Russian elite.

A massive cross stands as the sole resident of this water-locked Crimean crag.

340-foot statue built to honour the Heroes of the Soviet Union.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

Despite producing just a handful of movies, a brave and lyrical filmmaker has an entire museum dedicated to him.

One man’s collection of photography books has transformed into a charming exhibition space.

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.