No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The fake World Cup prize was secretly created after the first one was stolen in 1966.

This World War II relic let Allied pilots know they were entering neutral airspace.

Belfast's namesake river still winds below the city center, hidden from sight.

It was once nicknamed "the most bombed hotel in Europe."

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

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

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

Countless grotesque faces stare out from this eerie Prague art wall.

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

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

A mocking tribute to the past and modern leadership of Prague.

This chimerical bridge/tunnel appears to dead end right into the sea.

Swedish skyscraper with a 90° twist.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

Protecting the dead from opportunistic body snatchers.