It can be extremely difficult to cross the desert. Some people (quite a few actually) have died in their attempts to cross the various deserts of the world.
In a different light, there are crosses that have been erected to memorialize persons who have died.
There is a cross in the desert that has caused some debate in United States constitutional law and in political correctness: it also demonstrates the exisience of religous intolerance by way of not understanding or respecting the beliefs of religions other than Christianity. The cross of which I reference is in the Mojave Desert.
Snopes has checked out all the rumors and has found them to be true about the Mojave Cross.
The Telegraph of the United Kingdom has the story Mojave Cross memorial to WWI dead 'violates first amendment' abot the cross.
You might want to read the CNN story Justices weigh constitutionality of war memorial cross.
And, from the web site of National Public Radio you may listen to as well as read the story High Court Weighs Legality Of Memorial Cross.
It seems to me that many American Christians claim that they are not prejudice, that they do not discriminate, and that they are truly tolerant of other religions. And yet, they believe it is perfectly proper for the public display and government support of their religious beliefs while at the same time voicing strong displeasure and disapproval of any similar governmental actions that do likewise for Islam, Judaism, Druidism, Bhuddism, Tsaoism, Hinduism, Satanism, or other non-Christian religions. How many American Christians can honestly and truthfully disavow such prejudices? To them I say, stand up, be counted, shout it out, and say "cross my heart, hope to die" if that isn't really the case.