User: What are the most famous sights of Sicily?
Assistant: Sicily has a selection of stunning cultural and archaeological sights. The valley of temples in Agrigento is a conglomeration of temples and tombs from old Greece, dating back as far as 500 BC. Furthermore, the Etna is the tallest mountain in Sicily. The Etna is an active volcano, and the hiking paths offer stunning views over the island. Finally, the historical center of Palermo is another frequent stop for tourists as it has many ancient buildings, churches, markets, and alleys.