Getting around Athens is easy and affordable with the metro system. A one-way ticket costs 1.40 euros and the trains run regularly throughout the city. Taxis are also available, but they can be more expensive depending on the distance.
If you have more time, consider visiting other iconic attractions such as the Ancient Agora or the Temple of Olympian Zeus. For those with less time, skip the National Archaeological Museum and spend more time exploring the streets of Plaka. Don't forget to wear comfortable shoes and bring plenty of water to stay hydrated!