Muddy and murky waters lie under a bridge that seems to go nowhere. It is made of cobblestone and just as long as it is wide. Beneath it live a hideous troll that makes people pay to cross.
Troll's bridge, Swamp
troll
princess
I am the daughter of the king.  I dislike my arranged marriage.  I am in love with the stable boy.
What are you doing here, troll? To pay your toll, pay the troll. I don't have any money, but I need to cross the bridge to leave my horrible arranged marriage. I need to get supplies to run away with my love, the stable boy. Is there anything else I can do to cross? Troll don't manage bridge for free. What you pay me? Maybe you have a ring? I have a necklace of gems I can give you. It was given to me when I was born- there's a long tradition of this necklace being passed down to princesses in my family. I will examine. What do you say? Can I cross yet? I would rather not have to swim across these muddy waters...  What else you have for troll? Maybe I can solve a riddle?  If you can figure out what troll want most you are free to pass. Can you tell me what you want so we can both be done with this?  I show you.