Al-Khandaq is the main historical sight in Buraimi itself — a traditional Omani mud-brick fort with corner towers, a small enclosed courtyard, and walls about ten metres high. Restored in the early 2000s, it now houses a small museum on local history and is one of the few standing pre-modern structures in the town.
The fort sits a few hundred metres from the main square. Entry is free or very cheap. The interior is small; allow 30 minutes. The view from the upper rampart over the date palms and the modern town below is the best reason to climb up.