The seed spawns you in a nice plains biome with mountains and hills that have trees.
The cave entrance is in the ground and goes straight down. Be careful where you step or you will fall in probably. It's a little bit obscured by grass, so look around carefully.
It's so big I gave up on exploring the whole thing.
Also, GLOWSTONE is my other favorite seed. I've been using it for years. It also features a huge cave system. The entrance is really close to spawn too. It's really easy to spot. this one is also good for both survival and creative. Right now I'm just using it for survival. I have used it for creative in the past though.