Inside this Krakow church, an explosion of psychedelic color.

Remnants from a time before electricity.

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.

The first transatlantic wireless signal was received at this 17th-century fort.

A 125-meter long "tribute to the Brazilian people."

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

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

Krakow's own version of the Hollywood Walk of Fame.

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

This grubby wall is said to be one of the Earth's esoteric energy centers.

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

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

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

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

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

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

This ex-prison dates back to the Middle Ages.

A mysterious concrete hand reaches out from between the stones of Uniwersytecki bridge.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

These plaques found across Warsaw commemorate the sites where executions or battles took place during the German occupation.

At night, this memorial illuminates a ghostly outline of a footbridge that connected two sections of the Warsaw Ghetto.

A bronze replica of an elm tree that honors the victims that perished in Pawaik Prison.

The last king of Poland was interred in this church nearly 200 years after his death.