The Church of the Spilled Blood in St. Petersburg, Russia, is a popular backdrop for newlywed photos.  Here a couple stands on a bridge over one of St. Petersburg's many canals with the onion domes of the church behind them. In the red circle, not really visible in this photo, is one lock attached to the bridge rail.  I'm not sure whether this trend hasn't caught on yet in St. Petersburg, or whether previous locks have been removed.
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