
moderate
8–9 hours
Comfortable walking 6 km with light scrambling and short swims in hot conditions.
Hike into Wadi Shab’s blue pools, swim through a slot to a hidden waterfall, and then drop into the turquoise bowl of Bimmah Sinkhole—all in a single day from Muscat. This is Oman’s coast at its most accessible and adventurous, with limestone canyons, falaj-fed palms, and plenty of time in the water.
Dawn pulls a soft line across the Gulf of Oman as the coast road unspools east from Muscat. The Hajar Mountains rise in blunt folds to your left, the sea flashing to your right, and the day hints at heat even as the air stays cool. By the time you reach Tiwi, a narrow skiff ferries you across the waterway to the mouth of Wadi Shab. Palm shade gives brief relief. Falaj channels chatter along the path, and the canyon beckons upstream, its limestone walls leaning close as if to keep you moving.

The last 200–300 meters to the waterfall cave require swimming. Pack a drybag and expect to stash non-waterproof gear before the swim.
Wear sturdy trail shoes or closed-toe water shoes; the limestone is slick and rounded boulders demand traction.
Start early, carry at least 2 liters of water per person, and use sun protection—shade is limited once the canyon opens.
Dress modestly while passing villages; change into swimwear at the pools or park facilities, not along the trail.
Oman’s falaj irrigation system has supported date-growing villages here for over a millennium and is recognized by UNESCO for its engineering and cultural value. Local lore calls Bimmah Sinkhole the spot where a star fell to earth.
Wadis are sensitive to flash floods and erosion—avoid moving rocks, pack out all trash, and skip cliff-jumping to prevent damage to fragile limestone. Respect park signage and seasonal closures after heavy rain.
Essential for slick limestone and mixed hiking/swimming sections.
Strong sun reflects off pale rock and water; protect exposed skin.
summer specific
Keeps electronics and snacks dry during the swim to the cave.
Makes transitions between hiking and swimming more comfortable and culturally appropriate.