Answer:
What gets colder as it warms up?
Where can you find roads without cars, forests without trees and cities without houses?
What is so delicate that saying its name breaks it?
We traveled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. How can that be possible?
What is always coming every day, but never arrives until the next?
Two little holes in the side of a hill. Just as you come to the cherry-red mill.