The nest of Eurasian Eagle-owl is located in Latvia in Kurzeme region. The nesting area is known since 1998, when the natural nesting place was found on the ground. After several unsuccessful nesting cases on the ground, the artificial nest was build in spruce, about 10 m in height. Since 2013 the nesting is successful. The nest is so big, that a grown man might curl in it!
https://www.youtube.com/watch?v=ijtzb20FfNQ