"the land just ends", I love that. It sure does. Want to be creeped out: the steepness with which it dives into the ocean, it continues that steep down below the surface. The sea gets deep that fast. You only need to swim out a few feet and it's deep enough to sink a ship in these areas.
There are some beaches, pebble beaches. Have you seen beach rocks before, those round, smooth stones... range in size from a person's head to, say, a pack of cigarette? We have one of those near the city at Middle Cove. But for soft, sandy beaches, you need to go WAY north of St. John's to Lumsden. Or even further southwest to the other side of the island, at Burgeo.