Because a lot of you were asking about this church decorated with bones, I thought I would post another photo and give a bit more information. (Note the huge piles of bones on the left and at the back of the photo!)
It's called the Sedlec Ossuary and is in the town of Kutna Hora in the Czech Republic.
The story behind it is that in the 13th century, the land here was blessed and so it became a popular burial site. In the 14th century, with the plague and wars, thousands more people were buried here and it became really full. In the 15th century, the church was built here and monks dug up the buried bodies and moved the bones in here. The artwork wasn't done until the 1800s, though.