Los Algodones is the northernmost city in México, and also the northernmost strip of land, bordering the US border, between California and Arizona. It's a small town that's mostly just for Americans to go for dental services and buy things. There are many buses from Mexicali every day, but due to the coronavirus, there were only 3 buses per day each way, and thus I had to spend almost the whole day there (the bus was around 2 hours 20 minutes - MXN$48). It's a nice place though although certainly I didn't need the whole day there.