Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

Considered an architectural abomination by some, this metal-clad building is known as 'little red riding hood' by locals.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

The history of knife-making in this French city is explored through this museum.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

Monument to a suicide protesting the Soviet invasion.

Local stories say that if you drink from this well, you will return to Olympia.

This elaborate stone bridge over the Neisse river has sat in pieces since 1945.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Steadily reminding Czechia of its past.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

An artificial date palm stands as a memorial to Warsaw's Jewish community.

An impressive monument to Poland's independence.

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

Modern art commemorates one of the first military actions of World War II.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

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

On this Polish road, an optical illusion makes cars seem to roll uphill.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.