I am fairly new to minecraft forums and this is my first topic but it's a REALLY good topic. I have made an adventure map for minecraft called The Cave.
The Cave is an awesome adventure map where you are exploring through a cave and a random voice is talking to you. It is filled with loads of traps and pop-ups. Zombies coming out from the walls, potions falling from the sky, nausea and enderman fighting at the end. This map is awesome for all people from age 1 to 1001! The 2nd last room is absolutely smack-in-the-face crazy! You have to break 4 beacons while fighting mobs and you get to see the mysterious man for the first time! This map, like I said earlier, is absolutely smack-in-the-face crazy! This thing takes up a lot of redstone and mind working! This took me about a day to do and it is my first adventure map.
This is currently not for download but will be soon. You get a few buffs and they are blindness, slowness and nausea all with an amplifier of 2. Whenever it is able to upload, don't forget to read the story and rules behind you and pull all the levers. This is also multiplayer friendly with a maximum of 1-4 people. The rules for single and multiplayer are under the story.