A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

A computer bug so primitive it was an actual insect.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The most accurate timepiece in the world.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

The clock that sets them all.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

A modern mechanical planetary system, part of a 10,000 year clock.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

A collection of noses tucked inside an art museum reveals how times have changed.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

One of only two places in the world where two rivers cross each other without the waters mixing.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

Boats must transform into railroad cars to navigate this Polish canal.

The manor house where the Polish composer spent childhood summer holidays is now a museum and concert hall.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

The world's most delightful not-NOT-religion welcomes visitors to the town of Templin, just like its more stoic peers.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

A century-old shot ball factory tower is open to the public once a year.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

Blitzkrieg bop your way through Berlin's Ramones Museum.

A museum dedicated to a Cold War era sausage.