The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

The park is home to the United States's only still-operating Dutch windmill.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

Macabre astrological automaton clock dating to the late 1400s.

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

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

In the summer, the area around this sculpture transforms into a vibrant concert venue.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

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

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

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

This man-made mound monument was built out of soil from all across the Polish empire.

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.

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.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

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

An underground city of salt.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

With over 12,000 different species of plants, this botanical garden is Japan's oldest and most diverse.

The quintessential Japanese rock garden has existed for more than 500 years.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.