A church of bones, decorated with 40,000 human skeletons.

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

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

A cheeky architectural easter egg.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

This small train ride offers stellar views of the Grand Garden Palace.

Art Nouveau painter Alphonse Mucha spent 18 years creating these monumental paintings of Slavic history and mythology.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

Step into a pastel time capsule where candy is truly dandy.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Trees emerge from the surface of this small man-made reservoir.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

Canada's oldest railway tunnel is illuminated in a rainbow of color as it passes under the streets of this small city.

A French library that makes sure its love of books is writ large... giant in fact.

Balconies that have a most unusual accent.

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

This Italian church is as beautiful as it is common, except for the real skulls decorating the many mannequins inside.

Four-story slides send people whizzing through the math department at this Munich university.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.