The troll in the tunnel
In the tunnel from Castle Street to Bridge Street, a troll with a shield blocks the way.
Nudge 1Where to look
Trolls guard bridges and tunnels for one reason: tolls.
Nudge 2A stronger push
Something heavy and valuable lies near Crystal Falls.
Show the solutionThe whole answer, with a video
Drop the heavy bag of gold coins (from Crystal Falls) in front of the troll: he takes his toll and walks off.