Oh no, not another boring museum you might be thinking. We wondered that on the way there, but actually no, it's brilliant.
It's modern with lots of shiny steel and glass, and glass floors so that you can see both above and below the room that you are in.
It's built on legs on top of excavations that uncovered ancient buildings dating back 2,500 years. There are mosaics, pipes, baths and even toilets.
On the first floor are the original beautiful Caryatids that held up the roof of a temple on the Acropolis site.
But the wow factor is on the top floor. Huge windows give 360 degree views of Athens and the Parthenon.
In the middle of the room is a full size recreation of the top of the building and all of the artwork and sculptures.
It is beautifully done, but what they really want are the Elgin Marbles back from the British Museum to fill in the gaps.