<human>: Condense the text into a few key points

Let me preface this by saying that yes, I really do think the Feds can own land.

But this past weekend we had a situation in Oregon, as I'm sure you're all aware, and it's part of a crowd that for the past year or so have been pushing for Federal control of public lands being weakened.   

Inevitably, I see people in Social Media who go "where in the Constitution does it say the government can own land?".  My gut answer is that the Framers didn't think it necessary to include that somewhat obvious power, and indeed presumably George Washington(the presiding officer of the convention) would have overturned/stopped enforcing, say, the Northwest Ordinance if he thought it wasn't constitutional.
<bot>: Can the Feds own land?  And not just forts but, like, wildlife refuges, BLM land, etc?