Can someone confirm and fix if this doesn't exist?

Looks like there's a new circle here.

Not sure if these lines are smaller tennis courts or not.

way/6379649/history

This street and others nearby were changed from access=private to access=yes, but there appear to be signs that say "Private Street Not For Public Use" or "Private Property No Trespassing No Soliciting" all around the entrances to this little neighborhood.

Amtrak route (at least the Capitol Corridor) is on the wrong track. It should pass through the track closest to the platform, not the farthest one.

It looks like the Bear Transit RFS route got broken recently
relation/9712292
relation/9712292

way/258430611 is much wider than 6'-0". It looks like it's about 14ft of asphalt plus ~2ft on each side for a crushed rock jogging track.

node/1956163127 is not an obelisk. It's sort of a stylized modernist torch shape surrounded with benches in a little garden - some kind of war/veterans memorial I think. No obelisks here.

way/1098454597/history
Duplicate Memorial Glade added in changeset/126722749

way/263159511/history

bicycle=no looks wrong here. Bikes are generally allowed on the campus except in designated (signed) dismount zones and there's nothing special about this particular path.