Have you ever been to Greece, historically also known as Hellas?
No, but its a dream of mine to go!  I look at the pictures with the clear bright blue ocean.  I haven't looked into what I could do there yet.
It has terrific museums you could visit, from Western literature, historiography, and political science museums as well.
I really like museums and learning about the history of a place.  Is there a sight that is an absolute must for me to see?
I would recommend the Thrace, Crete, and the Ionian Islands as must see places.
I've never heard of the Ionian Islands. Sounds intriguing! I also can't wait to eat Greek food.  Some of my favorites dishes are Greek.
Yup, you should note that eighty percent of Greece is mountainous, so when you go on excursions, take plenty of food and water.