Here's a fun (if by fun, you mean terrifying and probably-going-to-happen) scenario: all the ice melts on the earth. What happens? Business Insider made a video exploring just that!
It's fascinating to watch. In some places, due to topography, the rising sea doesn't seem to change that much, cutting into a coastal city by half, perhaps (although that's still HUGE), but then you watch Florida completely disappear and Cuba left to just a few mountaintops.
Check it out! Will your home survive?
Via IFL Science.