Answer:
Who is the most foreign visitor you could imagine?
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.
As a state in the USA, I am round on both sides and high in the middle. What am I?
I sleep by day, I fly by night. I have no feathers to aid my flight. What am I?
When you take away the whole from me, there is always some left. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.