This picture shows the Arc de Triomf in Barcelona, Spain. I took it in 2016, while I was killing time before getting a bus to Amsterdam. (MegaBus From Barcelona to Amsterdam Sloterdijk)
The Arc de Triomf (Arco de Triunfo) is a triumphal arch that was built in 1888 for the Barcelona World Fair.
There are many triumphal arches in Europe. Most of them are white. The Arc de Triompf is breaks with tradition because it has a reddish colour instead.
This page compresses the picture but clicking on it will allow you to view it full-size.