Guess what this is

[ShiningStar]

it's full of air

[Crimsonthread]

Yes. This is much bigger than a bounce house, and isn't bouncy.

[RBS]

The shadows are interesting. This is near a tall structure. Is this the only one of its kind?

[Crimsonthread]

I don't know. I really have found very little information on this other than what it is.

Notice, for size purposes, that there is a person in the photo as well.

Also, don't overthink it.

[Jones]

An airmattress?

No: that's dumb. A float or blimp of some kind?

[ShiningStar]

so it's a non-bouncy house lol

[Jones]

A circus tent/building?

[Crimsonthread]

Sooooo much bigger than that.

And not a house, but yes to building. In fact, I'll accept that as the second word in the 2-word answer.

[Jones]

I just realized. I also made another guess one post above yours.

[Crimsonthread]

Probably not, although one could be hosted in a similar structure.

[Kahnescanuck]

It's a portable building!

You can rent them for events etc.

[Crimsonthread]

Portable, __________ building. There's a key word missing there.

[Jones]

Portable inflatable building?

[Crimsonthread]

Yes. I was actually looking for "inflatable pavillion," but with such an obscure object, I can't be too picky. Good work, everyone!

Your turn, Jones.

[Jones]

Thanks, to you and Kahnescanuck: wouldnt've gotten it without you guys.