Begin the drive towards the north area of Athens, where you will arrive at the Kalabaka town and Meteora in around 3.5 hours without any unnecessary touristy stops.
Visit two (maybe 3) of the incredible monasteries depending on the day of your visit. Originally occupied by 11th-century hermits, the monasteries later became hiding places for monks when the Roman Empire started to fall. The two monasteries you may visit are subject to change depending on the day of the visit since most have different opening days. Typically, the monasteries to be visited include the Grand Meteora Monastery and Moni Agiou Stefanou or Moni Varlaam.
After exploring Meteora, return to your private vehicle for your trip back to Athens which takes around 3.5 hours. A couple of necessary stops on the way to stretch your legs, and of course, enjoy great lunch.
Last stop to relax and see Thermopylae. The location of the historical battle between the Spartans (300) and the Persians. Continue the journey further south towards Athens to arrive and be dropped off directly at your Athens base in the late evening. An authentic tour with a great driver/guide!