The girl laughed. “I have to tell you the rules.” She tapped me on the shoulder. “You can walk right through all the walls to all the domes. They don’t really exist.” She laughed. “People think they do. People think they’re safe inside their worlds. Protected from the evils and dangers outside their controlled, managed lives.”
“The domes aren’t solid?”
“Nope. They’re imaginary.” She put her hands on her hips, “Except for the one you first came out of.” She shook her head. “That one’s real.”
“I can’t go back inside?”
“Nope. You can never go back to what was. That’s the past. It’s forever gone.” She looked around, at the other domes, “But imagine this. You have the possibility of exploring everybody’s domes!” Then, she walked into a nearby stream, and walked down it’s middle. “Go explore, you! Have fun!”
And she was gone.