European shore excursions can be as simple as a stroll through Copenhagen's fanciful Tivoli Gardens or as spendid as tours through the imperial residences of the Czars in St. Petersburg. You can inspect the architecture of Gaudí in Barcelona, take an all-day guided tour of Rome with a stop at Vatican City, and climb to the top of the Acropolis in Athens. One of the most popular excursions is from the port of Kusadasi (Turkey) to the ancient excavated city of Ephesus. You will walk along the marble road that Mark Antony's and Cleopatra's chariots once passed over to reach the Great Theater, where gladiatorial contests entertained up to 24,000 spectators and where St. Paul addressed the Ephesians. Pre-booking excursions is highly recommended as they can sell out weeks before you reach the ship.