Probably for the same reason I love amusement park maps, I love super clean architectural illustrations like the ones in these two stamps from Germany. The first one celebrates the 75th anniversary of the suspended tram in Wuppertaler and the second one is for the Sport Und Erholungszentrum recreation center in Berlin.
Celebrating space-aged architecture in Israel... at least that's what I think this one is about. I have a hard time reading Hebrew without the vowels in place. If anyone has more information on this stamp and/or the building featured in it, please chime in!