With just one day in Athens Greece, you can see the famous hilltop Acropolis, temple ruins, one-of-a-kind museums, and picturesque Greek neighborhoods. Many of the top sites and oldest ruins in the capital city are concentrated in a walkable area, so with an early start and a plan, you can get a solid overview of Athens in a day. This 1 day in Athens itinerary starts with a breakdown of the most popular things to do and see and suggests a few different ways to visit the ones that interest you most.