Ключевые слова: background, bridge, city, cologne, concept, couple, culture, day, engagement, europe, european, fence, france, friendship, hang, happiness, heart, icon, key, lock, locked, locks, love, loyalty, many, metal, old, outdoors, padlock, padlocks, paris, prague, railing, red, river, romance, romantic, security, shape, street, symbol, tourism, tradition, traditional, urban, valentine,