Need Some Ideas!

You could build a mage tower on an island not far from land with a bridge connecting the land island, You could also build a tree similar to the Great deku tree from OOT just without the face, I would build it in the middle of the forest. If your up for it build a whole world based around a one theme Such as Modern, Fantasy, Roman, Western, Japanese, ect. Hope this helps

@GlaD1MN0TU working on the fish tank now :3

Here are just some random ideas: A giant fishtank, a skyscraper, a haunted house, an unabandoned mineshaft and mining settlement, a rollercoaster, a spaceship, a 2D retro-inspired videogame level (like Mario or Kirby), and / or a large farm with a horse / cattle ranch (old west styled).

it my opinion, start with a medieval build.
For me, modern towers are harder, only because it is hard to add detail, since the architecture is alot more efficient.

@inudragon14 haha sure, I'm sure ill do some of the seven wonders. [manmade]

@Dusty15 Thanks! I'm gonna try to build a few of those, maybe add some redstone in. Appreciate the feedback!

Hmm, do something Original, Like maybe the Empire State Building, or the Parthenon, or the Leaning Tower of Piza!

sports stadiums,a fake final boss fight,NYC,a big river with villages,old timey wild west town. hope that helped