Greece

Here's an ideal itinerary for 3 days in Greece, including a boat cruise for your birthday:

Day 1:

• Start your day with a visit to the Acropolis, one of the most iconic landmarks in Athens. You can take a guided tour or explore on your own.
• After the Acropolis, head to the Plaka neighborhood for lunch. This charming area is full of narrow streets, colorful buildings, and plenty of restaurants and cafes.
• In the afternoon, visit the National Archaeological Museum, which houses an impressive collection of ancient Greek artifacts.
• For your birthday celebration, book a sunset boat cruise around the Saronic Gulf. You'll enjoy stunning views of the coastline and the sunset while sipping on cocktails and enjoying a delicious dinner.

Day 2:

• Take a day trip to the island of Hydra, known for its picturesque harbor and charming streets. You can take a ferry from Athens and spend the day exploring the island on foot or by donkey.
• In the evening, head back to Athens and visit the Monastiraki neighborhood for dinner. This lively area is full of street performers, shops, and restaurants.

Day 3:

• Start your day with a visit to the Ancient Agora, a large open-air market and gathering place in ancient Athens. You can see the ruins of temples, public buildings, and even a prison.
• After the Agora, head to the nearby Roman Forum, which was built during the Roman period and served as the administrative center of Athens.
• In the afternoon, visit the Benaki Museum, which showcases Greek art and culture from prehistoric times to the present day.
• For your final evening in Athens, head to the rooftop bar at the Hotel Grande Bretagne for a cocktail and stunning views of the Acropolis at night.

I hope this itinerary gives you a good idea of what to do during your 3 days in Greece, and that you have an amazing time on your boat cruise for your birthday!