Valley, or the Near East. The Laas Geel complex on the outskirts of Hargeisa in northwestern Somalia dates back approximately 5,000 years, and has rock art depicting both wild animals and decorated cows. Other cave paintings are found in the northern Dhambalin region, which feature one of the earliest known depictions of a hunter on horseback. The rock art is dated to 1,000 to 3,000 BCE. Additionally, between the towns of Las Khorey and El Ayo in northern Somalia lies Karinhegane, the site of numerous cave paintings of both real and mythical animals. Each painting has an inscription below it, which collectively have been estimated to be around 2,500 years old. Antiquity and classical era Ancient pyramidical structures, mausoleums, ruined cities and stone walls, such as the Wargaade Wall, are evidence of an old civilization that once thrived in the Somali peninsula. This civilization enjoyed a trading relationship with ancient Egypt and Mycenaean Greece since the second millennium BCE, supporting the hypothesis that Somalia or adjacent regions were the location of the ancient Land of Punt. The Puntites native to the region, traded myrrh, spices, gold, ebony, short-horned cattle, ivory and frankincense with the Egyptians, Phoenicians, Babylonians, Indians, Chinese and Romans through their commercial ports. An Egyptian expedition sent to Punt by the 18th dynasty Queen Hatshepsut is recorded on the temple reliefs at Deir el-Bahari, during the reign of the Puntite King Parahu and Queen Ati. In 2015, isotopic analysis of ancient baboon mummies from Punt that had been brought to Egypt as gifts indicated that the specimens likely originated from an area encompassing eastern Somalia and the Eritrea-Ethiopia corridor. In the classical era, the Macrobians, who may have been ancestral to Somalis, established a powerful tribal kingdom that ruled large parts of modern Somalia. They were reputed for their longevity and wealth, and were said to be the "tallest and handsomest of all men". The Macrobians were warrior herders and seafarers. According to Herodotus' account, the Persian Emperor Cambyses II, upon his conquest of Egypt in 525 BC, sent ambassadors to Macrobia, bringing luxury gifts for the Macrobian king to entice his submission. The Macrobian ruler, who was elected based on his stature and beauty, replied instead with a challenge for his Persian counterpart in the form of an unstrung bow: if the Persians could manage to draw it, they would have the right to invade his country;