I remember being completely blown away way back on live when I did the
Rogue Redemption quest for the
Burning Rapier. For the Oblong Bottle I had to swim to the bottom of the Ocean of Tears and search for it. WAIT, WHAT?!?! There are things found on the ocean floor?!
Still blows my mind thinking about swimming down through the depths and being mid-water where I couldn't see the surface or the bottom and swimming deeper and deeper and seeing the ocean floor appearing before me.