For 20 points, name this island in the Baltic Sea, the easternmost major island of Denmark.
The Almindigen forest on this island is notable for its glacial erratics.Â  It also contains the waterfall Dondalen in a northern rift valley, and an outcrop of the Jydegaard formation that yielded a namesake species of dromaeosaur. Gerhard von Kamptz's refusal to surrender this island resulted in its bombing by Soviets in 1945, and a 1658 uprising here led to Villum Clausen shooting the island's governor, Johan Printzenskold, to protest its cession under the Treaty of Roskilde.Â  It was once dominated by Hammershus Castle, built by the bishops of Lund, but is presently governed from Ronne.Â  For 20 points, name this island in the Baltic Sea, the easternmost major island of Denmark. 
The Almindigen forest on this island is notable for its glacial erratics.
Bornholm