my grandfather left me a small piece of land, what can I do with it?

Data center lol.

Spite House

I know it's shitposting time for ya'all, but still, serious answer: if it's in a busy area make a tiny pizza place selling slices to go.

Flowers and herbs.

art display

Bench with your name on it (oldmanalex)

nothing galvanized square steel can't fix

Native rain garden maybe?

This would already be a 59 storey building in NY.

Burial plot.

Lease it out for a Flock camera.