Rebuilt brick by brick after WWII and now UNESCO-listed, Warsaw's Old and New Towns are a compact, pastel-coloured base for a few romantic days. Tip: Catch sunset from the Krakowskie Przedmieście viewpoint over the rooftops and the Vistula. Things to Do: explore the Royal Castle, wander the Old Town Market Square, walk the historic walls to New Town, watch the changing of the guard at the Tomb of the Unknown Soldier, dine on Freta Street. Pic: Muzeum Warsawy