The Dreamland river is a river that flows through Dreamland, seperating Dreamland Castle from the rest of the city.
The water in the river comes largely from Heaven, and consists of the tears of angels. This is a critical part of Dreamland having magic, as this heavenly water mixes with the steam from Hell to create magic.
The river ends in a large waterfall next to the castle, that plunges into the sea below. Frequently, characters who fall into the river near the castle get swapped over the waterfall.