Budapest - 239 Hollandi út

It's a small parking lot on the shore of the small Danube. Quiet, undisturbed, not very busy in the night. Theres a walking path where you can check the ducks and the swans, a few hundred meters north there's another parking place alike (but more noisy because the bus turns there), a few other hundred, and you'll find a superb playground with a pirate ship. There's also a little ferry if you want to get to the other shore. There is a restaurant right there on the corner, I could never manage to get there yet, because its usually booked, but if you stay for a day, you can try.