In the Preclassic period the floor of the Copán Valley was undulating, swampy and prone to seasonal flooding. In the Early Classic, the inhabitants flattened the valley floor and undertook construction projects to protect the city's architecture from the effects of flooding.
In the Preclassic period the floor of the Copán Valley was undulating, swampy and prone to seasonal flooding. In the Early Classic, the inhabitants flattened the valley floor and undertook construction projects to protect the city's architecture from the effects of flooding.