You’ll be glad to know that the Yellow Lake isn’t in fact yellow. Instead, its azure waters, located on the outskirts of Al Ahsa city, are formed of the runoff from the 22,000 farms that populate the lush Al Ahsa region, home to one of the world’s largest oases. There are no roads leading to the lake, so a guide with an SUV offers the best way to navigate your path through the dunes to its idyllic and fern-fringed waters. Take a picnic, explore the overlooking hills, and don’t forget your binoculars: During winter, several species of birds come here to breed among the vegetation, including the greater spotted eagle and moustached warbler.