Answer:
I sit in a corner while travelling around the world.
I am the place to turn to when nature calls. What am I?
Railroad Crossing, look out for the cars. Can you spell that, without any R's?
As a state in America I am round on both sides and high in the middle.
What invention lets you look right through a wall?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.