I just recently learned that cryptography was heavily regulated, in the US at least. What I mean to say is that in the older days (80's - 90's) it was illegal to export any encryption system out of the country. This was mainly due to concerns about the potential for these technologies to be used by adversaries to encrypt communications that could not be intercepted by intelligence agencies.
Obviously, cryptography is valuable, however it was unexpected to read about all the regulations in place regarding this subject, though, now I think it makes sense.
Used to do this with my friend when I lived in a bigger city. It's relaxing to see new parts of the city while driving, especially if you have no where to got.