1) it’s an “M”.
2) it stands for “Mining” — there is a large mining college there.
3) it is, although I have no idea how one might verify this fact, supposed to be the largest “M” in the world.
“Platte Mound M” by Thatoneguy89 – Own work. Licensed under CC BY-SA 3.0 via Wikimedia Commons.
“Platte Mound M Plaque” by Thatoneguy89 – Own work. Licensed under CC BY-SA 3.0 via Wikimedia Commons.
Found without additional assistance:
- Lighthouse
- LawnBoy
- Garfield
- Jesus Rodriguez
- Phil Ower
- steve willis
- mehmet DURMUS
- lelie
- Steve J.
- Farceur
- Marisa Boraas
- Maureen
- steven simmons
- Sarah G
With the hint:
- Charley Seavey
- RichardPG
Unless this M is visible from space, I’m pretty sure Shiek Hamad bin Hamdan Al Nahyan have crushed their record thoroughly: http://urbanpeek.com/2011/09/05/hamad/