North -possibly Oslo or Helsinki, though I go for St. Petersburg.
South - I go for the southern tip of the Indian peninsula, that you most likely have visited (see eastern longitude). Ethiopia (a bit south from Addis), Venezuela, Colombia and Panama are other possibilities.
East - Somewhere in India (Lucknow?)
West - Somewhere on the Pacific coast north of SF. I go for Victoria island.
Pretty good.
St Petersburg is correct, Kanyakumari is correct (just beating out Costa Rica), "somewhere in India" is correct though you're far too far north - doublechecking, it's still slightly closer the 80th than the 81st actually and anyways, it's just stepping out of the Kerala Express (Delhi to Trivandrum in 50 hours, though I got out at Varkela after 49) and buying chai and bananas on the platform. At Vijayawada. If that don't count it's Mahabalipuram, which is only just beyond the 80th. America's Pacific coast is correct, but Oregon rather than BC.