In a particular scene I'm currently writing, my MC and her companions are sailing in this small boat (canoe-ish) down a river to get to someone's house in the wilderness. The way my fantasy world is set up, there's one major geographical region that's a dense city, but the farther away from it you get, the more isolated and rugged the territory grows. People who live in the wilderness areas sleep by day and are awake by night because they have to be alert to keep guard against large, hungry monsters that prowl the community looking for food. The farther out you go, the more monstrous, alien and aggressive the creatures are. (They don't have any type of agenda or side, they're just wild animals of the fantay world). The city is no safe haven, and has its own more serious and dangerous problems, but that's not encountered until later chapters. My MC and her friends are boating down this river to get to their destination because hiking through the woods is far too dangerous. (They have to hike on the way back though due due to unforseen circumstances ) Anyone have any ideas on how to make a boat ride through this type of river as ominous as possible? I've already included dark, murky waters; rapids; creepy noises and animal calls; glowing eyes; etc but am wondering if anyone has any really unique, out-there awesome ideas on how to make it even scarier. If so, I'll give you rep! Thanks!