The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

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

A statue honors the children who fought Nazis in Poland.

Atop this library is one of the most beautiful green spaces in Warsaw.

One of the world's largest collections of medieval religious art.

This hidden collection of everyday objects illustrates life within communist Poland.

A 20th-century picture show in 3-D.

Order “Proletariat’s Cutlet” at this communist-themed restaurant allegedly once visited by Lenin.

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

Disturbing works of outsider art, carved from whole logs.