An open world.
"Woah."
Ella gasped, as her curious eyes scurried about the whole place. Twas the end of a path which led to a busy road. The texture of the soil was different as well as the feel of the air. The strangeness of the sun's heightened scorches sent a pain down their spines.
"What just happened?"
She turned to ask the Professor who was already walking ahead of her. She hurried to catch up with him as he said,
"I've always thought about something like this. I never thought twould be possible. I had no idea that such things really do exist."
He stopped walking and turned to the puzzled Ella,
"Little lady, we have just crossed a portal between two worlds."
"Two worlds?"
Ella asked, her face contoured by both worry and disbelief. The Professor nodded his head. She argued further.