Saudi Arabia's outdoor landscape has opened significantly to international visitors in recent years. The Asir National Park in the southwest — green, cloud-forest highlands at over 2,000 metres above the Tihama coastal plain — carries baboon troops, vervet monkeys, and a highland flora and fauna completely unlike the rest of the Arabian Peninsula; the escarpment viewpoints over the Red Sea coast 2,000 metres below are among the most dramatic coastal panoramas in the Middle East. The Al Shaqq Canyon in the Hejaz range near Taif is a slot canyon of considerable depth accessible on foot. The Empty Quarter's Uruq Bani Ma'arid protected area carries the Arabian oryx reintroduction programme — herds now visible from the desert road in the evenings. The volcanic fields (harrats) of the Hejaz are a geological landscape of lava tubes, ancient basalt fields, and volcanic crater lakes found nowhere else in the Arab world. It really hits differently.