Castello Branco '83

 

I assumed that a little bit of Googling would reveal a "White Castle" that was the likely location of this slide. Instead, it suggest that this may be related to Humberto de Alencar Castelo Branco. He served as the first President of the Brazilian military dictatorship after the 1964 military coup d'etat. 

More likely is the most important monument in Castelo Branco is the Jardim do Paço Episcopal (Garden of the Episcopal Palace). It is one of the most beautiful baroque gardens in Portugal and contains statues of allegories, kings and zodiacal signs, arranged around ponds, terraces and staircases.

Bonus - Twenty Five Years and One Day ago, a particularly shitty example of Air Rage.