Cuckoo awoke to the noise of other ponies shouting about something. She groggily pulled herself up off the seat and glanced out the window- and nearly had a heart attack. There was nothing beside the train!
Leaning closer to the window, she saw that they were crossing a very high viaduct over a steep valley. She only saw this for a few seconds, as she quickly scrunched down against the seat and closed her eyes.
Cuckoo was not the sort of pony who liked being up high.
It was ironic, really, a pony with wings, afraid of heights. And raised by griffons, no less. Sure, she could fly- she just didn't enjoy going higher than about a first-story roof.
But then something occurred to her. A viaduct in the mountains? She thought they'd been leaving the mountains when she'd fallen asleep. Cautiously looking out the window once more, she saw what everypony else had been shouting about. They had nearly reached Canterlot.
Cuckoo nearly fell out of her seat. The train had practically crossed Equestria! How long had she been asleep? Hours, at least. Maybe days. She was certainly hungry enough for ten meals.
As the train drew closer to Canterlot, Cuckoo took a moment to grab her bags and get ready to depart. She tried to smooth her hair- small chance at doing that. It sprung up everywhere, obscuring her horn completely.
She pulled her bags over her back as the train pulled into the city. It certainly looked impressive enough. A good place to start in a pony's journey of self-discovery. She carefully trotted off the train and strode off the platform, ready for anything.
Well, most anything.