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.
Das Kehlsteinhaus. A Historical Guide to the Eagle's Nest. The Kehlsteinhaus and the nearby town of Berchtesgaden are both located in the region known as the Berchtesgadener Land, located deep in the south-eastern corner of the Free State of Bavaria (Freistaat Bayern).