Good Riddles

Question: Used to see, Far and wide, Beautiful views, Or a night time sky.

Question: Which gate can you not go through?

Question: I am alive yet not alive. I can fly yet always on the ground. I am delicate yet can lift tonnes. What am I?

Question: What word is shorter when you add two letters to it?

Question: I can be cracked, I can be made. I can be told, I can be played.

What am I?