I’ll be honest. Monterrey is neither particularly pedestrian-friendly, nor really beautiful outside the tourist zone. Meaning: Barrio Antiguo and the centre and its surroundings. That may sound a bit direct and harsh, but I’ve never liked beating about the bush.
As background knowledge: I was definitely warned in advance. I was told beforehand, including by people from Monterrey, that Monterrey is not friendly for people who like to walk – unless it is close to the Barrio Antiguo – and also that there is not much to see in Monterrey apart from the well-known attractions. As I am a curious person, a bit of an adventurer and also a bit stubborn, I thought to myself ‘let’s see’ and was then obviosly proven wrong. 
Nevertheless, I discovered two places on my walk through the streets that I thought were really cool. To my mind the highway in Monterrey has something special about it and even has a slightly hypnotising effect, and I also thought this train station with the pictures etc to be really cool. So I did find something. Unfortunately, there’s not much more.

Go or not? Well, what I found was really cool, but it’s really difficult to stroll through the streets in Monterrey – simply because of the structure of the city. And you can explore the Barrio Antiguo in 5 minutes. It’s full of cafés, hostels and honestly looks pretty similar everywhere. It’s pretty, but you’ll have seen it after just one walk.