My USA road-trip
Driving into Atlanta. While I found driving in the US in general to be A LOT more relaxed than driving in Germany, driving near and into big cities was a bit scary.
So many lines and trucks on both sides of you. In Germany trucks are only allowed on the right, slow lane and all fast traffic passes on the left. To suddenly have big AND fast cars overtaking you from both sides was - different. We also needed a while to get from the left to an exit we needed to take when the exit-lane was 5 lanes away. :D

