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.
The name 'Eagle's Nest' was coined by Francois Poncet the French ambassador after a visit there in 1938. It was never known as a Teahouse but today gets confused with the actual teahouse Hitler used, the Mooslahnerkopf Teehaus, situated not far from his residence, the Berghof.