The concrete walkway spanning the city's river from the docks to the Odyssey complex is more than a mere footbridge. Built in 1994, the Lagan Weir pioneered riverside rejuvenation by controlling water levels and helping to clean up the dirty old river. The Lookout, at the docks side of the Weir, was once a neat little interpretive centre providing good views along Belfast Lough - but is now closed. At night the Weir is floodlit in neon blue, insipring some amusing sorts to call it the city's biggest conterfeit machine. The Lookout is the embarkation point for the Lagan Boat Tours.. spot the Big Fish sculpture and you're there.