When I landed, I wanted more than anything else to do the one thing you shouldn’t do when trying to ward off jet lag: sleep. Just a short nap. It wouldn’t do me any harm, right? As much as I wanted to sleep, I knew that if I did, I would be paying for it dearly for the next week. So I walked. I walked down one of the main streets, across the bridge, and back along the waterway. Budapest is beautiful by night.