Uninterupted sailable protected waterways that can't be built out. Sansara is one of the oldest and most complex continents with 900 Sims. Sansara has coastal waters in the North, modern channels, internal seas and an elevated Sutherland Abyss water system. Priced to sell at $14,998.
http://maps.secondlife.com/secondlife/Metis/239/37/22