Fancy a holiday on a Jerusalem roof, waking up to a bird’s eye view of the city? Recently opened Gag Eden offers just that for the eight guests it can accommodate at a time. Jerusalem’s first municipal camping site in the city center, Gag Eden (a play on “Gan Eden,” or paradise; gag in Hebrew means roof) is located on top of the Clal Center, between Mahane Yehuda market and Ben Yehuda street. This new tourist space and many others in Israel are part of a recent explosion in “glamping,” a portmanteau of the words “glamour” and “camping,” which, naturally,...