A statue commemorating a Polish dog who took his role as man's best friend very seriously.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

This public observatory is home to the "celestial cannon," the longest pointable telescope in the world.

The world's biggest floating museum in Gothenburg, Sweden.

The most impressive of Basel's three remaining city gates.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

Faceless white figures loom over the city from the rooftop.

The oldest statue in the Netherlands has survived relocation, bombardment, and burial.

A memorial commemorating the place where Truman gave the order to deploy the first nuclear bombs on Japan.

The home of president Truman during the Potsdam Conference, and the place from which the atomic bomb strike on Japan was triggered.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A town that sets itself apart with supersized designer seating.

A journey through every aspect of the human body.

A futuristic rocket marks the spot where three borders meet.

The world's largest collection of fire-fighting items dating back almost 350 years.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

One of the world's largest collections of pharmaceutical artifacts.