What is a good idea to build in minecraft?

Build a huge Steve battling the ender dragon

The best ideas are the unique ideas, don't do things everyone has done before, Church, Eiffel Tower, Statues ect, do something unique.

I'm currently building my street, I've gone out and taken photos, and I'm also use Google Earth to help with the scale of it. It's a project that will take me weeks to build but it will be worth it.