What is the purpose of cement pillars in the desert?

Concrete pillars in the desert have the following functions:

1. Navigation and direction markers: The desert terrain is complex and there are no obvious landmarks. Cement pillars can help people identify directions and avoid getting lost.

2. Provide security: There is a lack of water sources and shading facilities in the desert environment. Cement pillars can mark safe locations, such as supply points or emergency shelters.

3. Travel guide: In some desert tourism areas, cement pillars can be used to mark specific attractions or important navigation information to help tourists visit and explore. Therefore, cement pillars in the desert have the above functions.