Can anyone tell me what I have here.

[imaginationfactor]

I got this dome from an yard sale, its made of fiberglass it has the door I'm trying to find out what it was used for??

[ambercat16]

Post a photo when it is finished

[imaginationfactor]

Will do, I'm a SFX and theming fabricator and I'm building some zombies for an Ekka ride so might be a few months.

[kopenhagen5]

Love the creativity.

I'm thinking a time machine and fit it out with an oculus rift with walk throughs of different time periods.

[imaginationfactor]

If I had another one I could make my own FLY movie.

[lloydslights · Accepted solution]

Your example may be the top part of a navigational buoy.

If the seller knew what it was, it may have doubled in price

[serendipityricho]

If thats a lid on the top-may have been a compost bin......................................Richo.

[imaginationfactor]

Bingo, after looking into bouys as an option I found a guy who used to make these, it is the top of a bouy.

[imastawka]

     Well done.    Come back and show us when it's finished

[tasfleur]

I finally have worked out what it is!

Yes yes yes!  It is definitely a house built especially for a giant zucchini or cucumber ..... 

[fo-trut]

Kinda reminds me of an old movie called "The Fly"

https://www.youtube.com/watch?v=NH-8L1iZq20