Lost Civilizations‘Sacred’ pyramid built by forgotten civilization in Amazon rainforest may be world’s tallest ancient structure Posted on May 14, 2025 by Administrator A strange peak in the middle of the Amazon rainforest may actually be the largest pyramid ever built in the ancient world. Known as Cerro El Cono, this massive, pyramid-shaped formation is cloaked in mystery due to both its striking structure and the extreme difficulty of reaching it. The 1,310-foot-tall, pyramid-shaped hill sits in Peru’s Sierra del Divisor National Park, near the Ucayali River in the Amazon.
