One of the highlights of my trip to Greece has been the museums. They have had an awesome selection of ancient exhibits on display. The biggest museum in Greece is without a doubt the National Archaeological Museum in Athens with rooms dedicated to the Minoan's from Akrotiri, Mycenaeans, Classical and Hellenic Greece as well as Roman Greece. It was well worth the visit.

Read more about the museum and its exhibits on the (Wiki link)

National Archaeological Museum

Kouros from the Sanctuary of Poseidon at Sounion. The Artemision Poseidon Bronze.
Minotaur bust. Jockey of Artemision.
Santorini Room - Exhibits from Akrotiri's Minoan civilization.
Map of the site at Akrotiri.
Mycenae Room - Exhibits from the Mycenaean civilization.
Model of the site at Mycenae. Mycenaean wall paintings - note the Minoan influence.
Paintings of shields.
Wall Painting from Tiryns "The Lady of Mycenae". Gold funeral masks. Silver rhyton with gold horns.
The original gold "mask of Agamemnon" found at Mycenae is actually some 400 years earlier than Agamemnon, but the name has stuck.
Gold cups (note the paintings on the pottery in the background). Other side of the Mycenaean gold cups. Gold rhyton from Mycenae.
Gold elliptical funeral diadems from Grave Circle A "Grave of the Women" Mycenae (1600-1500 BC).
Plaster sculpture of a a woman's face. Bone armour helmet.
Classical, Hellenic and Roman periods.
Marble statue heads from the island of Aegina. Statue of a Sphinx from around 500 BC.
The Antikythera Ephebe. Marble sculpture from Delos. Aphrodite and Eros fending off Pan.
Statue of Athena Antikythera mechanism from around 100BC