- A huge lake; think "great lake" from our world. Basically a freshwater sea.
- A tunnel where the river flows in/out of the underworld.
- A fork in the river
- A bridge built by giants. Humans have improved it/colonized it; the "steps" are 10' tall, human scaffolding makes them passable.
- Wetlands; a huge swamp.
- A canyon, where the shores mostly become cliffs, and the river cut a mountain in twain.
- A ford
- A ferry, that uses ropes and pullies
- A fort built in a rock-island. Has chains/arrows/rapids to prevent bypassing it.
- A strange people who get their food from large, electric stone mushrooms. They believe in eternal life/reincarnation. One of them is building an airship.
- As noted, cataracks. Above/below can be very different.
- A flat flat plain, where the river meanders and moves over the land, and crossing a 100' shortcut can save days of river travel.
- Were-weasels, were-crocs, were-hippos
- Electrix eels.