I have a collection of large deep sea shells, coral, sponges, and starfish.
I also collect fossils and other weird items that you would find in the ground.
I also have a rocks and minerals collection.
Then I have a butterflies and interesting insects collection found all around the world.
Lastly, I collect Swiss Army knives of yesteryear and current issues. (Victorinox, Wenger, Leatherman)