Here be dragons

I'm riding a horse, pushing it to run through an old, decaying city of stones. It's build over water, and we have to jump over water canals to reach my objective. It's a tower of crumbling stones, half covered with wines. I get off my horse and get in.
It's not abandonned; in fact, there are people here, a family. They furnished the house with drapes, flowing veils and scattered cushions, all very colorful and standing out again the gray stones. It does little to protect us from the damp, chilly atmosphere, but it's cheerful. I get up some crumbling stairs, ending up in a bedroom with one of the wall destroyed, opening into a breath taking vista of the lake the city is build on. I feel tired, and lay down on some cushions.
I wake up from the panicked call of the mother of the house, begging me to take her daughter and flee. I get up and slip on a bright blue t-shirt big enough to dress a lumberjack and pull the girl with me to the fallen wall. She doesn't thing twice and jump in the lake. I take a more safe approch and climb down the wall before getting into the water. My plan is to swim discreetly to the border of the town, where my horse is waiting.