North: Isle of Skye (it's a while ago, so I don't remember which bit — going with Portree); 57n24 6w12
East: Rimini, Italy; 44n4 12e34
South: Austin, Texas; 30n16 97w45
West: San Francisco, California; 37n47 122w25
Mid point: 43n50 54w55 which seems to be in the middle of the ocean about 250 miles south of Placentia, Newfoundland. Nearest visited point: probably Boston, 42n22 71w04.