According to a recent World Happiness Report, the Danes are the happiest people in the world. Whether it's the high wages and low unemployment rate or something magical in Copenhagen's salty sea air, a cruising visitor will feel the positive vibe -- and no doubt bring a little extra "happy" back to the ship. Sitting on the east coast of Denmark, Copenhagen has been the country's capital for 600 years, and it's the largest city in Scandinavia, with a population of 1.9 million people. It's home to the world's oldest monarchy (King Erik VII set up permanent residence in 1417), and its present Queen, Margrethe II, currently lives at Amalienborg Palace. A country rich in Viking history, grand castles and lush green countryside, Copenhagen is a charming city of 17th- and 18th-century buildings, beautiful parks and gardens, pretty promenades along canals, and ancient winding streets made for walking and biking. During the longer days and warmer weather of summer, outdoor cafe lounging and outings to magical Tivoli Gardens are highlights.