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

A heavily politicized roundabout discussing the state of a heavily politicized country.

This monumental work of art symbolizes the coming together of a previously divided city.

Spain's largest bullring offers a unique glimpse at architecture and history.

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

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

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A delightful museum entirely dedicated to the tiny homes of dolls.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

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

Chelsea's soldiers were given strict orders when crossing this historic bridge.

This 13th century Gothic brick castle is the largest in the world by surface area.

This museum is dedicated solely to this millennia-old handheld cooling device.

The Great Fire of London and the regulation of one-way streets both started in this alley.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

Warsaw's fantastically preserved gasworks...almost.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

This open-air heritage museum illuminates centuries of historic English life from a West Sussex village.

Brought to you by the makers of fiberglass dinosaurs.

The pockmarks across the building's facade are remnants of the Blitz.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A mysterious shape catches the eye in this 16th-century painting.