There seems to be an error with the coords for the following cache...
> Stone Wall Stash (Pennsylvania) by Mark McConnell,
N 20° 20.751 W 80° 7.739 (WGS-84)
The Mapblast map places the cache a few miles off the coast of Cuba! Assuming N 20 should read N 40 would place the cache somewhere SW of Pittsburgh, which would make more sense :)