The waypoint and starting area are on a raised area overlooking the ocean. The medium extension gives a ramp down to a beach area with a shipwreck. The large extension gives a ramp up to a further raised area with rocky walls.
In 3.5, there's a Karui gateway installed in the top right corner of the hideout. The gate will become closed for new characters until the they killed Tukohama in Act 6.