Hanoi is a city of stunning visual and audio contrast. The rickety sounds of cyclos (pedicabs) fight for airwaves amidst the blasting horns of motorbikes, and the Nike swoosh wallpapers the French-styled building facades in the Old Quarter.Hoan KiemThe Hoan Kiem district, Hanoi’s commercial nucleus, ripples out from the lake of the same name. The lake’s name means Lake of the Restored Sword, according to a legend dating back to the mid-15th century. A magical sword, having been found in the lake by the then emperor, and used to fend off the invading Chinese, was snatched by a giant golden tortoise and returned to its home in the depths. The tranquil, 18th-century