The ancient city also included tunnels, water Chambers, and an amphitheater, which held 4,000 people.

这古代的城市也包括地下隧道，水室，和一个圆形剧场，那容纳4千人。

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Often equipped only with head lamps and homemade maps, they explore the tunnels and ancient rooms, sometimes staying underground for days at a time.

CNN: Loving life in Paris' Empire of the Dead

Finally, housed in ancient, arched basement tunnels, is the Museo Archeologico containing a vast collection of pieces found near Siena, including elaborate Etruscan alabaster funerary urns and gold Roman coins.

BBC: Two days in Siena, Italy