Ilikur's Bridge

Ilikur's Bridge, known in the region as the "Haunted Bridge", was a monumental construction that spanned the Huntinghorn Water and Black Maw Bog between Westbridge and Triboar in northwest Faerûn. It was part of the Long Road that connected Waterdeep to Mirabar in the far north.

Structure
The bridge was made from three massive granite blocks and spanned the stream and bog in the north-south direction. The two plinths were 60 ft (18 m) from west to east, 20 ft (6.1 m) from north to south, and rose 30 ft (9.1 m) above the ground extending another 10 ft (3 m) below ground. The deck slab was 100 ft (30.5 m) long, 50 ft (15 m) wide, and 12 ft (3.7 m) thick with a slight arch of about 4.0 ft (1.2 m) in the middle relative to the ends. At both ends of the span were 100 ft ramps that sloped down to meet the Long Road.

Each ramp was contained between two fitted stone walls that were anchored to a plinth. The space between the walls was filled with rubble, river rock, and gravel built up to form a roadbed 40 ft (12 m) wide plus another 5.0 ft (1.5 m) of guard wall on either side to prevent people, draft animals, and wagons from falling off the edge. These side rails were also made of tightly fitted smooth granite blocks and topped with a sloped capstone rail. The road itself was cobblestone for the entire length of the bridge and ramps. The choice and positioning of the blocks that formed the superstructure allowed water to pass through and drain away which minimized the problems of ice formation, both for travelers and for the long-term damage of countless freeze/thaw cycles.

Features
Ilikur's Bridge earned the "Haunted" moniker by virtue of the loud male voice that emanated from it under certain circumstances or when particular conditions were met. For example, when a creature walked solo across the midpoint of the bridge, the voice calmly and clearly stated "Be changed, for there are always too few to do the great deeds that are needful." There were many such utterances and various sages that studied the bridge over the years determined that all of them came from an ancient version of the magic mouth spell. The vast majority of the mouths were visible on the underside of the span when triggered, with a few others placed on other surfaces of the bridge.