I'm in the mood to solve some riddles, so... What's your favourite riddle?

Currently mine is- I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Updates
11 mo
Sorry! Medical emergency but now I'm back. Let's see how many of them I can guess it right, lol
I'm in the mood to solve some riddles, so... What's your favourite riddle?
Post Opinion