Dubrovnik is a beautiful city with a rich history and culture. Here's an ideal itinerary for 6 days in Dubrovnik:

Day 1: Arrival and Old Town Exploration

• Arrive in Dubrovnik and check into your hotel
• Head to the Old Town and explore the city walls, which offer stunning views of the Adriatic Sea and the city
• Visit the Rector's Palace, a Gothic-Renaissance palace that was once the seat of power in Dubrovnik
• Take a stroll down Stradun, the main street of the Old Town, and enjoy the charming architecture and lively atmosphere
• End the day with a delicious dinner at one of the many restaurants in the Old Town

Day 2: Island Hopping

• Take a boat tour to the nearby islands of Lokrum and Elafiti
• Explore the lush botanical gardens and ruins of a medieval monastery on Lokrum
• Swim in the crystal-clear waters and enjoy the sandy beaches on the Elafiti islands
• Return to Dubrovnik in the evening and have dinner at a local seafood restaurant

Day 3: Dubrovnik Cable Car and Sunset Cruise

• Take the Dubrovnik Cable Car to the top of Mount Srd for panoramic views of the city and the surrounding islands
• Visit the Museum of Croatian War of Independence, which is located at the top of the mountain
• In the evening, take a sunset cruise along the coast of Dubrovnik and enjoy the stunning views of the city from the sea
• Have dinner at a local restaurant and try some traditional Croatian dishes

Day 4: Wine Tasting and Cavtat

• Take a day trip to the nearby town of Cavtat, which is known for its beautiful beaches and charming old town
• Visit the Račić Family Winery and enjoy a wine tasting of some of the best wines in the region
• Explore the old town of Cavtat and visit the Racic Mausoleum, a beautiful example of modernist architecture
• Return to Dubrovnik in the evening and have dinner at a local restaurant

Day 5: Game of Thrones Tour and Lokrum Island

• Take a Game of Thrones tour and visit some of the filming locations in Dubrovnik, including the Red Keep and the Walk of Shame
• Take a ferry to Lokrum Island and explore the island's many attractions, including the botanical gardens, the Dead Sea, and the Fort Royal
• Return to Dubrovnik in the evening and have dinner at a local restaurant

Day 6: Dubrovnik Beaches and Nightlife

• Spend the day relaxing on one of Dubrovnik's many beautiful beaches, such as Banje Beach or Copacabana Beach
• In the evening, explore Dubrovnik's vibrant nightlife scene and visit some of the city's best bars and clubs
• Have a farewell dinner at a local restaurant and enjoy the last night of your trip in Dubrovnik

I hope this itinerary helps you plan your trip to Dubrovnik!