Final answer:
Yaxchilán is located on the south bank of the Usumacinta River in Mexico. It is an ancient Mayan site and a popular tourist attraction.
Step-by-step explanation:
Yaxchilán is located on the south bank of the Usumacinta River. It is situated in the peripheral region of Mexico, which includes the state of Chiapas and most of the Yucatán Peninsula. The area is primarily inhabited by Amerindians of Mayan ancestry. Yaxchilán is known for its ancient Mayan ruins and is a popular tourist attraction.