No, it's not Florida - go more west....
The area where this trailer is standing is quite famous.
Correct, Francis: Pat and Joe Travis and their Little A'Le'Inn :wink:
Yes Francis, Area 51 it is - they call this old trailer
lovingly the "research center" of Area 51
Not that lake. ( Is there a "pluri" lake?

)
Hehe, it just seemed like the little mountain formation
is a calcium deposit.
Iceland?
No, CJ, it's not a concretion. And it's not in Iceland.
Lk - As long as I know, 3 mains reasons for that color : natural color, guano, ice (or snow).
CJ - right, it's a lake.
somwhere in the northern hemisphere - Alaska perhaps?
CJ - somewhere in the northern hemisphere, but not Alaska.
Is it the United States though?