I'm in the process of building my own fantasy world for my first original novel (I've previously just dappled in fan fiction). I'm focusing on one continent for now along with a couple of nearby islands. There are at least three races that I've decided on. Humans, an aquatic/human race (not mermaids...they basically look like humans but just a few differences such as closeable gills in the neck so that they are comfortable in or out of water), and a 'feloid' race (cat-human). The idea is that no one knows of the feloid race yet. Basically, the continent has a huge, um, mountain made up of tall, sheer cliffs in the middle of it. No one has ever been able to climb it. The humans always just traveled around it by land or by sea if they wanted to travel to the north end or south end of the continent. Anyhow, the idea is to have a huge earthquake create a rift in the mountainside enabling people to enter/climb the mountain for the first time, thus discovering the feloid race. I wanted to include the 'discovery' of a new race and the results thereof as part of the plot. Now, as I'm still building the world, I have no real problem altering parts of it. Maybe the feloid race is on an island instead? Anyhow, is this idea feasible? Or do you think it is a bit far-fetched that they hadn't been able to climb the mountain and discovered the race yet? Oh, and this is not a 'modern' world. It's sort of medieval with magic and such. Edit: Bah, typo in title...forgot the 'b' in unclimbable, can't change it...sorry.