An enormous cave system!
You begin at an average jungle biome.
Huge caves, enormous ravines, and infinite places to explore.
Strongholds and temples, just near spawn.
Just take a look at the pictures.
^A big ravine with many caves. X: 136 Y: 31 Z: 384
^The entrance to the massive cave system. You shall be lost! X:155 Z: 350
^ I downloaded an X ray pack just for this!
^Jungle temple. X:40 Z: 597. (Whoops, sorry for bad picture)
^Stronghold! X: -160 Z: 785 (Sorry for inaccurate coordinates, just dig around, it's almost cheating anyway. )(Huh... Singleplayer working as multiplayer could actually be useful! That's how I found this seed..)