To get around Athens, there are many options such as public transportation, taxis, and walking. The metro system is efficient and affordable, with a single ticket costing €1.40. Taxis are also widely available but be sure to negotiate the price beforehand. Walking is a great way to explore the city and take in the sights, just be prepared for some hills and cobblestone streets. Expect to spend around €20-€30 on transportation during your stay in Athens.
If you have more time, consider taking a day trip to the nearby islands of Aegina or Hydra. For those with less time, consider skipping Lycabettus Hill or Exarcheia. Remember to wear comfortable shoes, as there's plenty of walking involved. Lastly, be mindful of pickpockets in crowded areas and keep your valuables close.