Best short riddles

I have keys but no locks. I have a space but no room. You can enter, but can't go outside. What am I?

What two keys cannot open any doors?

I hiss. I can be poisonous. I am long. I have a forked tongue. What am I?

You can see me in water, but I never get wet. What am I?

I have no life, but I can die, what am I?

What do you get if you cross a giraffe and a hedgehog?

Guy de Maupassant hated the Eiffel Tower. So every day, he had lunch in the one place where it couldn't be seen. What was that place?

I have seas without water. I have forests without wood. I have deserts without sand. I have houses with no brick. What am I?

Where can you find rivers with no water, cities with no buildings and forests with no trees?

If an electric train is going east at 60 miles an hour and there is a strong westerly wind, which way does the smoke from the train drift?