石栏外侧雕有龙头龙尾各三,头东尾西,形制意为以龙驮桥,故名曰“龙桥”。龙桥南北二坡呈S形,坡头原修建有南北对峙的城门。桥上的龙头龙尾与桥面上水道相通,每逢雨天,桥面积水从龙头龙尾喷出,直倾河中,景象蔚为壮观。龙桥桥体全部用青石条建造,结构坚固,历经明、清、民国三代280年仍稳固屹立。
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