By BRT, the brandnew city bus system, we get to Kariakoo. Ferdinand, my guide, leads me trough many street market to a remarkable building, with funnel type roof. It was built by the Germans as an exhibition and market place, he explains me. The roof was constructed to collect rainwaters and drain it to tanks. While traveling trough Africa, i was wondering so many times, why no one got the idea to collect rainwater, but going long ways to muddy wells or to rivers. And although the Germans brought this idea decades ago, there’s still hard to find areas, where rainwater get collected. Inside and around this building are market as found all around Africa. But there’s a big concrete way leading under the halls. It remains me at entrance for military bunker. Once inside the black hole, the eyes needs time to adapt on the dark. Some torches were lit to show customers the vegetables, fish and other goods sold by women sitting in the darkness. Keep your stuff tight on you, reminds me Ferdinand, while i try to follow his voice. From a few windows light breaks in and lays over the piles of tomatoes. In the darkest corners candles shows the way to the potatoes and fishes. It feels weird and thrilling to wander trough those halls, hearing strange sounds and whispering people. From far comes bright light trough a big gate, the exit. I step into sunlight, heat falls on my head and i’m back into hustling Daressalam.