Archaeologists have discovered a 2,500-year-old steam bath in Guatemala, with tunnels and steps carved into the rock. The complex is one of the oldest, most intact steam baths found in Mesoamerica.

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Mexico City stands on the ancient site of Tenochtitlán, which, by the late 15th century, had emerged as the bustling capital of the Aztec Empire. One of the city’s oldest neighborhoods was ...