These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

It's always summer at the beach inside this former airship hangar.

A monument on the pavement marks the spot where two cultures that shaped Sarajevo come together.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

The center of this Polish border town was so thoroughly wiped out in World War II that only the foundations remain.

This formerly-prosperous Silesian mining town was completely demolished in the late 1960s and early 1970s as an attempt to cover up a secret Soviet uranium mine.

This wooden mosque is one of the few remnants of medieval Poland's Muslim Tatar community in this deeply Catholic country.

An extensive network of secret tunnels was created for the Nazi project "Riese."

Tall columns of volcanic basalt make up this improbable-seeming rock formation.

Bohemian paradise covered in majestic forests.

This elaborate stone bridge over the Neisse river has sat in pieces since 1945.

The last original stone marking the interwar border between Germany and Poland sits in this unassuming village park.

Special benches that play Chopin's music are scattered throughout his native city.

Real bones which are said to have belonged to a Polish dragon.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The commemorative stone column conceals a secret laboratory.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

One of the greatest movie directors of all time lived and worked in this London flat from 1926 to 1939.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

This German monument honors the so-called "Prince of Mathematicians."

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.