A military amphibious vehicle heads down a flooded street in Obrenovac, Serbia. Residents were preparing for a river surge Monday that threatened to inundate Serbia's main power plant. Darko Vojinovic/AP hide caption

itoggle caption Darko Vojinovic/AP

At the Museum of Broken Relationships in Zagreb, Croatia, each item is accompanied by a story from the donor on how a romance fell apart. Sean Carberry/NPR hide caption

itoggle caption Sean Carberry/NPR