Located next to the Greek parliament, the National Garden is a large green space behind the Temple of Olympian Zeus and home to the Zappeion. 

If you have had enough sun during your day of sightseeing, this is a quiet, shady place to relax and cool off. Inviting trails lead through tall trees and offer a reprieve from the busy streets. It's also a free attraction in Athens.

On the edge of the garden is the Zappeion Hall, which you can enter for a peek inside if it is not in use. It was built in the 1870s and is used for events.