Asher and Peru crossed the Thar desert in India by camel, and travelled with nomads in Cholistan, Pakistan. They also crossed the Uruq ash-Shaiba, the highest dunes in the Empty Quarter of Arabia and trekked by camel in western Australia. In the course of his research for various books, Asher reconstructed T. E. Lawrence's camel-journeys in Jordan and Sinai; trekked with Tuareg in the Hoggar mountains of Algeria, and with Moorish nomads in the Aoukar valley of Mauritania. Asher and Peru also trekked on foot through the rainforest of northern Papua New Guinea and canoed by dugout down the Sepik river. Asher has visited Mount Kailash in Tibet, where he performed the pilgrimage on foot.