I've had almost everything that has been listed so far except the truffles (cuz I'm sure that the chocolate kind doesn't count!

) and Brain! I am a very adventurous eater!
One of my favorite things to gross out folks with is the Sea cucumber--yummy yummy sea flavored rubber! lol
Rattlesnake comes in second to the sea cucumber!
I love kohlrabi raw with just a bit of sea salt. But something around here likes them more than me as I end up with only one or two each year before the whole plants just start disappearing

.
I know that there has to be something that I want to try but haven't yet but have drain bramage at the moment and just can't think of one yet!
Wait!! I got it! Sea Squirts! Andrew Zimmeran had them in Chile! There I got one! lol
If you are really willing to try something good--get small live octopus and have it prepared quickly and dip the still squirming tentacles in ginger soy sauce and chew vigorously! They do like to cling a bit on the way down!

Keep the lips closed tho--they will try to make a break for it!