Very good to park and visit Monaco. You can reach it through the tunnel using regular road. The height of the tunnel is enough for big trucks to pass. The price for the night is 9.6EUR (19h-07h), from 07-19 it is 4EUR/h and as you stay longer it is getting cheaper.

Very good place to visit center of Belgrade. If you occupy two parking spots you need to pay double rate so 17EUR. Do not let them send you to the bus stop, just say you are going to pay for two parking spots.

The place exists, but it is little bit harder to find.