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.
Hitler's Tea House, known to Americans as the Eagle's Nest. Das Kehlsteinhaus is the famous Teehaus (Teahouse in English) which was built on the Kehlstein mountain in the Bavarian Alps by the Nazis as a gift to Adolph Hitler for his 50ieth birthday.