The UnXplained (2019)

S08E01 Impossible Ancient Structures

Across the globe, there are monumental structures that are so enormous, meticulously crafted, and perplexing that they appear unimaginable, not only for their era but for ours too. From towering walls and immense stone mausoleums to intricately carved temples hewn from solid rock, how did ancient societies accomplish engineering marvels that continue to challenge contemporary comprehension?