The Endless Jump is pretty much what it sounds like. It's a very, very long parkour map. It's not extremely hard but because of its length it can get tough to keep focused on the tasks ahead.
The entire map runs in a black and white theme with a glowing ceiling made out of glowstones. In that sense it's a quite strict and robust design but it's good in a way as it keeps you set on the parkour challenges and don't distract you.