Walls

They were built strong and tall. The years that passed made them even stronger, impenetrable.
There's a gate of some sort, entry was allowed. The key was inside yet hidden.
She lived inside all her life. I saw her out sometimes. No, very seldom.
I saw her climb up, took a risk for a minute wondering where it could lead her, thinking if it was worth a try, only to realize no one was out. Not a single thing.
The air was heavy, suffocating.
Disappointed, she went back in. Back home. Comfortable. And happy.