The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

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.

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.

An underground city of salt.

This outsider art house has gone from clinical creation to astounding artwork.

A breathtaking viewing platform over the Alps.

Fantastic stories on a miniature railroad.

The personal charnel house of Anton Bruckner.

The world's oldest known salt mine.

An Austrian house of bones filled with hundreds of intricately painted skulls.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This artistic fountain display pays homage to this area's theatrical history.

After Christopher Columbus died, his son built a fancy house to rule from.

The first official clock in North America, it kept time for the Spanish government of Santo Domingo.

Built in 1512, the oldest cathedral in the Americas.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

The final resting place of Christopher Columbus - or possibly someone else.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

This lurid German fountain plots the sad course of marriage from dating to death.