Mountains birthed me, wind made me fly, I drown your feet where oceans lie. Kids build castles from my skin, Time itself is trapped within. What am I?

I am where the horses run, where long grass bends and sways, I am where the wind blows fierce, where gusts and breezes play, I'm so named because I'm flat and empty, people might think I am dull, But take a closer look at the birds and bees and you'll see I'm rather full

I am a rock group with four members. All dead, one was assassinated. What am I?

I keep the sunlight at my door, but welcome echoes in. Though many fear my darkest parts, great wonders lie within.

I stretch ahead, but never travel. I can be walked, crossed, or ruled. Some fear the end of me; others dream of it. And when cerulean becomes more than just blue, you’ve entered Miranda’s world. What am I?