This Russian museum stresses the importance of keeping clean and even holds one of Pavlov's dogs.

This cuddly rodent has a place of honor at a Russian institute for genetic research.

One of the world's largest collections of pathological specimens.

360° views of the city plus five floors of optical illusions and hands-on science.

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

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

India’s only Brain Museum displays over 200 fascinating ways that your brain might kill you.