Madain Saleh National Historic Park Saudi ArabiaThis region, the Biblical Midian, is mostly undulating desert, interspersed with huge rocky outcroppings and lush oases.
Here, between 500 B.C. and 100 A.D., the same Nabatean people who carved the great structures of Petra, Jordan, created 125 monumental cut-rock tombs and facades, edifices up to 130 feet tall, still standing today in remarkable preservation.