The Lost City

Grandma was right.
Nobody really believed her. Not even you, her favorite grandchild.
But she was right. And more so than you could ever imagine.
The city before you, deep in the mist shrouded forest, can't be found on any map. It shouldn't even exist. Though it's been asleep for a long time, you feel a mysterious power begin to awaken from the ruins around you.
Legend has it the civilization that built this place could somehow control the seasons. But nobody listens to legends.
Nobody except Grandma.
And she was right.
You look again at the artifact she gave you. Close to this lost city, it almost seems alive in your hand.
The city does exist. It's real.
Could the secret magic, powerful enough to change the seasons, be real too?