Siwa keeps its own time. Wedged near the Libyan border at the far western edge of Egypt's desert, this oasis sat so far beyond the reach of Cairo that until a paved road arrived in the 1980s it was reached mainly by camel — and the isolation shows in the best way. People here speak Siwi, a Berber tongue, not Arabic first; women weave bridal silver and embroidery to patterns older than the nation-state; and the whole green basin of date palms and olive groves floats in a sea of sand, ringed by salt lakes that glitter like spilled mercury under the sun.

The oasis wears its history in mudbrick. The Shali Fortress rises from the centre of town, a thirteenth-century warren of kershef — salt-and-mud — that melts a little with every rare rain and still looks like a sandcastle abandoned by giants. Out at Aghurmi stands the Temple of the Oracle of Amun, where in 331 BC Alexander the Great came to be confirmed as a son of the god; you can climb to it for the same long view he had. Nearby, the rock-cut tombs of Gebel al-Mawta — the Mountain of the Dead — keep their painted ceilings, and the spring-fed pool known as Cleopatra's Bath still bubbles cool and clear.

Evenings belong to the water and the silence. Locals and travellers drift out to Fatnas Island, a palm-fringed spit on a salt lake, to watch the sun sink and the surface turn pink and gold. Dinner might be slow-cooked lamb and dates at Abdu, a fixture for decades, or a quieter table at Albabenshal tucked into the old fortress walls. Stay long enough and the rhythm gets under your skin — the call to prayer over the palms, the donkey carts, the hyper-saline lakes where you bob like a cork, and the certainty that out past Adrère Amellal's lamplit mudbrick the Great Sand Sea runs on for hundreds of empty miles.