And I didn't get it because I thought they were asking for a building that has yet to be finished that will be the tallest and is said to reach the sky. I thought of heaven as sky which is one word in my mother language.
I only knew it because my parents were supposed to visit there on a People-to-People tour of Europe and the Soviet Union in the 1970s, but at the last minute their destination was changed to Finland and my mom was disappointed at not going - she thought it was going to be a botanical garden. (But it turned out that she loved Finland, too.)