How does love begin? Maybe it starts with the soft gaze of sparkling eyes drawing you in. Maybe it's a passionate kiss that takes you by surprise and leaves you breathless.

These unexpected moments give way to an intoxicating feeling that you are happily hopeless against. It is start of love. The events that lead to it inspire lovers to show their commitment to one another in the most remarkable ways.

One such way to epitomize unshakable love is with a love padlock. Going back to World War II, couples in Serbia symbolically sealed their love before the men went off to fight by locking a personalized padlock to what is now known as the Bridge of Love.

Today, cadenzas d'amore, or love padlocks, are adorned with initials or messages of adoration and locked on bridges such as Pont de l'Archeveche or Pont des Arts in Paris as a sign of eternal devotion. Lovers then toss the keys into the Seine.

Paris and Serbia aren't the only such places to keep your love on lockdown. Around the world from Ponte Milvio in Rome to Mala Strana in Prague, this swoon-worthy tradition is an unforgettable gesture of romance that continues to stand the test of time as a beautiful way to profess your love.