What If Superman Adventures, submitted by me. When we feature websites that revolve around a fictional character, they usually take a turn for the horribly sexual. That's not the case here. What If Superman Adventures takes pictures of Superman and pastes him alongside other people (fictional and real) with basically no explanation or Photoshop talent or any real point. The only "What if?" being answered is "What if someone from the Fark comments section was obsessed with Superman?"
Some of my favorites:
The most advanced and up-to-date method of checking the temperature from cricket noises.