Hi there
I have built two new ocean monuments
One on dry land (really in the ocean but under glass) with extra lighting, and vines for climbing between levels. This dry one can be found /home roza ocean
The second one I just finished a little while ago and it was built underwater in a guardian spawning area. The link below shows pictures at different stages of the build.
http://imgur.com/a/UFidCThis monument can be found at /home roza monument. To explore this monument you will require the ability to breath under water (potions and/or enchanted helmets) and of course you will have to watch out for the guardian's. The guardian's have really taken to protecting the entire monument inside and out. If you are lucky you may find a sponge room before you run out of air. There are protection stones so you will not be able to create your own air pockets.
(please note I only build on the smp server)
I hope you have fun exploring these monuments.