ˈæftɚ ðɛɹ dɪskˈʌvɚɹi ɐ ɡlˈæs ɹˈuːf wʌz ɪɹˈɛktᵻd ˌoʊvɚ wˈʌn nˌɪɹ ðə nˈɛbɪlɚstɹˌæs sˌoʊ wˈʌn kæn stˈɪl vjˈuː ɪt.
After their discovery a glass roof was erected over one (near the Nebelerstrasse) so one can still view it.