The merry go round that can take you to other worlds?
I remember another thing I read somewhere, I think maybe a gurps magic items book. There are 2 types of tickets, silver and gold. Both, if used, take you to a amusement park that seems to have entrances to different worlds and has folks from other planets, worlds, and dimensions. The main difference between the 2 is with the gold ticket you can use it anytime you want to go to the amusement park & it is always open. With the silver ticket there is a chance when you arrive in front of the entrance that you'll see it's closed for this or that reason for a few days or hours (forgot the details). I don't recall if it has separate entrances to the various places, or not.
As for the bridge I'm sure Jason could help with repairing/rebuilding it, considering what sorts of things he knows.