#4 Ski Jump Tower, Cortina D’ampezzo, Italy, 1956 Winter Olympics Venue

Interesting fact about these ski jumping towers is that the Swiss jumper, Andreas Dascher introduced a new style of jumping, which would soon come to be known as the Dascher technique. Before these Games, the athletes would hold their arms forward over their heads. Dascher reasoned that if the athlete held his arms at his side he would fly farther. Adherents to this new style dominated the competition.
Fabio Gregoroni

#5 Swimming Pool, Berlin, 1936 Summer Olympics Venue

View of the swimming pool in the 1936 Olympic village in Elstal, west of Berlin. The village, which housed over 4,000 athletes for the notorious 1936 Olympic Games in Berlin, then under Nazi rule, was used as barracks for the German army shortly afterwards, and from 1945 as barracks for Russian officers, until the Russian army’s final withdrawal in 1992.
Credit: Peter Bromley