#28 GF - Vienna, Austria

While in Salzburg, it is worth going to St. Peter Stiftskeller. Located within the walls of the monastery of St. Peter's restaurant is one of the oldest in the world. The first written mention of this place dates back to 803. Mozart and his family ate regular meals there.   

Sikorsky S-42 - Vienna, Austria

The Sikorsky S-42 was a commercial flying boat designed and built by Sikorsky Aircraft to meet requirements for a long-range flying boat laid out by Pan American World Airways in 1931. 

The innovative design included wing flaps, variable-pitch propellers, and a tail-carrying full-length hull. The prototype first flew on 29 March 1934.   

Belvedere Castle in Vienna - Vienna, Austria

The Belvedere is a historic building complex consisting of two Baroque palaces (the Upper and Lower Belvedere), the Orangery, and the Palace Stables. 

The Belvedere was built in 1721-1722, where the State Treaty between the Allied and Austria has been signed on May 15, 1955.