Using the superflat world editing use i used the water world preset, but removed the water layer.

this means that it is still classed as an ocean biome, however it has no water. this means that I could find an ocean monument

without all the pesky water in the way.

have a look round, see what you can find.

important:

if you cant see anything, do a quick turn and you should see a command block that will take you to the monument.

However, if you cant see anything as far as the eye can see in all directions, notify me.

or look for one of your own.