This antique thermometer honors the creator of the first universal temperature scale.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

These mechanical goats first battled it out in the year 1551, all because of an overcooked deer.

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

A statue honors the children who fought Nazis in Poland.

A striking public sculpture representing the period of martial law in Communist Poland.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

A collection of old neon signs from all over Poland line a secluded courtyard.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

The silly symbol for an underground protest group is now scattered around the city.

Museum dedicated to "the man who moved the Earth."

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.

Naturally formed rock city in Poland.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

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.

An underground city of salt.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The sign at the garden gate reads: "These Plants Can Kill."

A million and a half tons of earth were used to create one of the world's largest land sculptures.

Huge winged monument in the United Kingdom.