This is the largest and most popular of Athens’ many museums, and is usually very crowded. Its vast collection includes treasures unearthed from Mycenae by Heinrich Schliemann, a staggering array of sculpture including the earliest known Greek figurines dating from around 2,000 BC, frescoes from the volcanic island of Santorini, as well as remains of Antikythera mechanism, the oldest known mechanical computer, and so much more that it is recommended visitors make several visits to absorb it all.