Bimmah Sinkhole
هوية نجم
Muscat Governorate, Oman · 23°02′10″N 59°04′16″E
A limestone sinkhole 600 m from the sea, filled with turquoise water where fresh and salt water meet, with steps down from a free municipal park.
The sinkhole formed when the roof of a cave in the coastal limestone collapsed, leaving a bowl 50 by 70 m across and about 20 m deep at the visible surface (divers report it continues much further). Seawater seeps through the rock and mixes with fresh groundwater, which produces the colour. Small fish nibble at swimmers' feet.
Local legend attributes the hole to a meteorite, hence the Arabic name, "the deep well of the falling star".
Why it stays quiet
It sits between Muscat and Sur and gets tour buses briefly around midday. Early morning or after 3 pm it is often empty, and it is free.
Where it is
Before you go
Changing rooms and toilets in the park. Swim only in calm conditions. No shade at midday.
Updated 2026-09-06 · Suggest a correction
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