my design of a lighthouse

this took about 4500 blocks of smooth stone on average and 100 netherrack and a handfull of glowstone
and its done except for the 3 openings i don't know what to do with it expansions maybe?
road to underwaterbase?

--PLEASE GIVE ME IDEA'S FOR THE 3 OTHER OPENINGS-- WHAT SHOULD I DO WITH IT??

-UPDATE [out of smooth stone >.< need more supplies to smelt it also]

todo:

-make the 4 light overhangs 4/4 done
-think of ideas of what to do with the 3 other openings....