To travel between destinations, it's recommended to rent a car to have a more flexible schedule. Public transportation is also available, such as buses and trains. A car rental for 10 days can range from €250-€400 depending on the type of car and insurance coverage. Average fuel costs are €1.50 per liter, and tolls on highways can range from €10-€15 per trip. Plan for about 4-6 hours of driving per day.
If you have more time, consider spending an extra day in Athens to visit the Acropolis Museum or explore the trendy neighborhoods of Exarchia and Kolonaki. Alternatively, if you have less time, skip a day in Thessaloniki and visit only the White Tower.