Wadi Naqab

If you've never seen a "wadi" you absolutely must come here. 

Wadi Naqab is a natural wonder and it's extremely easy to get to.
All you need is a car with good ground clearance.
It's an easy drive, but it's a dead end, so at some point you'll have to retrace your steps.
Depending on the season, you may find water in the river.
In winter and during or after the rains, take care to watch out for high water and flooding.

Here you'll find plenty of spots for picnicking and even bivouacking. 

Difficulty
1/5 very easy drive ; watch your ground clearance !
Not suitable for SUVs 

GPS 1 Wadi Qida'a Entry (same as Wadi Sal Route)
25.78452, 56.07489

GPS 2 End of the track
25.76465, 56.12179