On a rainy afternoon in Heraklion, one of the best things to do is to visit the Heraklion Archaeological Museum. This museum is home to an extensive collection of artifacts from the Minoan civilization, including pottery, sculptures, and frescoes. You can spend hours exploring the various exhibits and learning about the rich history of Crete. The museum also has a cafe where you can grab a coffee and relax while taking in the ancient treasures.