An Aldehyde is an organic compound containing a terminal carbonyl group. This functional group, which consists of a carbon atom which is bonded to a hydrogen atom and double-bonded to an oxygen atom (chemical formula O=CH-), is called the aldehyde group.
Berchtesgaden-a town in Bavaria The town of Berchtesgaden is located near Hitler's Eagle's Nest (Kehlsteinhaus) and can be easily reached by train; there are several hotels and it is an inexpensive place for tourists to stay overnight.
Berlin-Spandau -- Fort Hahneberg-a Nazi Eagle (now headless) with swastika was added to this 18th-century fortification's main entrance during the Third Reich period. Berlin-Spandau -- Eagle over the entrance to a former Napola (Nazi political education institute) on Hohenzollern Ring.