Main base = 20112/47/44801.
There is a glass platform at world height above that.
Near that is a surface entrance to a double cave spider spawner, 19933/74/44849.
Closest portal to main base is 19853/84/45027, which connects to 2481/119/5628. From that portal there is a rail line to a guardian farm. The other direction leads to a few fortresses, and some group's abandoned base.
There are a few goodies at each of those locations, but pretty much all the diamonds/emeralds/gold/iron/sponges were in the echest.
Ice spike biome at 16785/69/40256
One near spawn at 8637/87/1481
Finally found a jungle near spawn around -4700/y/-8170.
There is a cool abandoned base near 4823/y/7660
There's a nice little church at 25364/64/57845. I didn't build it.
Zombie spawner at 64038/56/91624
Untouched ocean monument somewhat close to spawn - 10871/y/4904
Skeleton spawner near spawn: -4470/49/-988
Mineshaft under ocean , with a regular spider spawner, near spawn: 8983/28/6343
Zombie spawner at 20116/48/44798
Got bored and banned. Never robbed nor griefed anybody. Just wanted to see what others had made. All my loot was legit. Spawn villagers should to be nerfed. Have fun with 1.11. I'm out.