Athènes

Here's a suggested itinerary for 7 days in Athens with your boyfriend and sister:

Day 1: Arrival and Acropolis Museum

• Arrive in Athens and check into your hotel
• Head to the Acropolis Museum to learn about the history of the Acropolis and see some of the artifacts found there
• Take a stroll through the Plaka neighborhood and enjoy dinner at a traditional Greek taverna

Day 2: Acropolis and Ancient Agora

• Start your day early and head to the Acropolis to beat the crowds and heat
• Explore the Parthenon, Propylaea, Erechtheion, and other ancient structures on the hill
• Afterward, head to the Ancient Agora to see the Temple of Hephaestus and other ruins
• End the day with a sunset drink at a rooftop bar with a view of the Acropolis

Day 3: National Archaeological Museum and Lycabettus Hill

• Visit the National Archaeological Museum to see some of the most important ancient Greek artifacts, including the Mask of Agamemnon and the Antikythera Mechanism
• Take a break for lunch at a nearby cafe or restaurant
• In the afternoon, hike up Lycabettus Hill for panoramic views of the city
• Enjoy dinner at a trendy restaurant in the Kolonaki neighborhood

Day 4: Day trip to Sounion

• Take a day trip to the Temple of Poseidon at Sounion, located on the southern tip of the Attica peninsula
• Enjoy the scenic drive along the coast and stop at beaches along the way
• Watch the sunset over the Aegean Sea from the temple's clifftop location
• Return to Athens for dinner at a seafood restaurant in the Mikrolimano harbor area

Day 5: Monastiraki Flea Market and Psiri

• Spend the morning browsing the stalls at the Monastiraki Flea Market for souvenirs and unique finds
• Have lunch at a nearby taverna or street food vendor
• In the afternoon, explore the trendy Psiri neighborhood with its street art, cafes, and bars
• Enjoy dinner at a modern Greek restaurant with live music or entertainment

Day 6: Day trip to Delphi

• Take a day trip to the ancient site of Delphi, located about 2.5 hours from Athens
• Explore the ruins of the Temple of Apollo, the theater, and the stadium
• Visit the Delphi Archaeological Museum to see some of the artifacts found at the site
• Return to Athens for a late dinner at a traditional taverna in the Exarchia neighborhood

Day 7: Mount Olympus and farewell dinner

• Take a day trip to Mount Olympus, the highest mountain in Greece and the mythical home of the gods
• Hike to one of the lower peaks for stunning views of the surrounding landscape
• Return to Athens for a farewell dinner at a rooftop restaurant with views of the city and the Acropolis

I hope this itinerary gives you some ideas for your trip to Athens with your boyfriend and sister! Let me know if you have any questions or need further assistance.