Minecraft problem

[nuba km]

So I have made in order: A turtle in the middle of the ocean (burned down), A mine that starts in the middle of the ocean, A stone tower in the middle of the ocean (I can see the burning turtle from it), A skull from magma and glass(attached to the tower), a library (on top of the skull), A forest with pond, river and waterfall(on top of the library), a tower that reaches to the very top of the map(next to the forest, also there is a giant crater of where I got all the dirt for the tower) and I don't know what to do next originally I planned of making a tree house but that seems so small compared to the rest of what I have made.

SO I have two questions: what should I do next? and have you ever had problems topping your last project?

On a side note I have been playing minecraft for a total of about 20 hours I feel I have achieved a lot.

 

[Daemascus]

Make an amusement park with working rollercoasters and waterslides.

 

[Theron Julius]

Doom fort and yes

 

[hittite]

Go into the Nether and build a Hell Fort (if you can't mine obsidian, there's tutorials online of how to build a gate using lava and water).

 

[EHKOS]

I have wanted to make a project, but since my minecraft thing doesn't work and I'm too lazy to make it anyways... BUILD A FLYING AIRSHIP FROM SUPER MARIO BROS. 3!

 

[Mr. Eff_v1legacy]

I fell in lava and died.
Enjoy your ocean tower.

 

[gigastar]

Still thinking what to do after completing my magma-armored underwater glass pyramid. Of DOOM.

Perhaps making a waterslide/waterlift/canal network to get around easier.

Perhaps a proper doom fortress...

Perhaps a sky fortress...

Nether fort is really tempting but I can never get anywhere without getting lost... and dying.

Glass tower has a certain appeal but a certain downside too...

Oh well im sure my randomness will compensate. Eventually. I hope.

 

[TheYellowCellPhone]

Go to the Nether and make a castle.

 

[Erana]

Make a bridge.
No one ever makes bridges, but I'd love to see like a mega labrynth bridge or something.