The Inland Sea.

The Khor Al-Udaid area is known locally in English as the 'Inland Sea'
The Inland Sea is a large tidal embayment with a convoluted shoreline, about 15 kilometres from north to south and up to 12 kilometres from east to west. It is connected to the Arabian Gulf by a relatively narrow, deep channel, about 10 kilometres in length.
This name also is applied to an enormous area of moving sand dunes, which are the main draw card for tourists to this area.

Tour guide's Preference

Full Day Tour. (Actually goes to the Inland Sea!)
Depart Al Khor at 0800hours and travel to Sealine. Arrive approximately 0930hours
At Sealine, while I'm deflating the tyres, you will have the opportunity to ride a camel.
We will depart Sealine at1000hours and begin the dune adventure. We will travel through the dunes for about 1 hour, with photo stops, then we will proceed on the sabkha for approximately another hour, arriving at The Inland Sea at the end of the channel from the Arabian Gulf. On a clear day you will be able to appreciate the size of the Inland Sea.
We will then have lunch, which is provided, after which you may swim and relax.
We will depart the Inland Sea at about 1500hours
The return trip to Sealine is mostly on sabkha, with some small dunes.
After inflating the tyres at Sealine we proceed to Al Khor, arriving at approximately 1730hours
Cost: In my vehicle: QR 300 pp including lunch.
Pickup in Doha would be at approx 8:00am (West Bay area)