This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

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

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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

A magnificent collection of imperial armor and weaponry.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

The Habsburgs' royal collections of art and wonders.

Baroque celebration of the end of the Great Plague of Vienna.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The final resting place for the remains of 143 Habsburg royalty.

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

The attic of a four-century-old canal house hides a clandestine church.

The history and future of cannabis.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Perhaps the most scandalous statue of America's first president.

The bronze uniforms commemorate the vital role of women during World War II.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

A unique tribute to the millions of animals who served and died for the British military.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.