Ah, Tanzania and helicopters...
If you ever find yourself in the skies over Dar, there's a helipad on the roof of the Holiday Inn but don't land there! It was the brainchild of the hotel's owners and a brave chap from Everett actually landed a Dauphin there once as a kind of proof-of-concept. With the front wheel all the way forward of the pad, the rear wheels apparently cleared the rear edge by about 4 centimeters. Beyond the edge: a twenty-storey drop-off. To their credit, the Tanzanian CAA denied the hotel a license for their pad. So nevermind arriving by helicopter but do visit the rooftop bar if you can for sweeping views of the city and good food.