The road from Obersalzberg to the Eagle´s Nest parking lot is considered a feat of engineering. The road was blasted out of solid rock in only 13 months time and is considered to be unique in this construction design.
The great difference in elevation is achieved with only one switchback and crosses the steep northwest side of the Kehlstein mountain twice. In 1952 the Eagle´s Nest road was closed to public traffic and a special mountain bus service was put into operation.
Through the frost and snow of winter, the rock walls of the Eagle´s Nest road are damaged from falling rock from above, therefore every spring the walls are "cleaned" and since 1952 have insured that no accidents have occurred.