Zundbridge

Located about 10 miles southeast from Waterdeep, where the Trade Way crosses the Dessarin River. The bridge is after the wizard Zund who created it about 80 winters ago.

There is a Waterdeep guard post. The warded guardpost has stone hut and is walled with a tower. Additionally, the guardpost has three griffon mounts at its disposal. There is also a campground, and a water pump.

Don't magically mess with the bridge, it's rumored to be a stone golem of some sort. As for size, it's squat and massive. From the picture in Volo's Guide it looks about 15 to 25 feet wide.