Hello, I am 60 yrs old man and have suffered from a few heart problems in the last few years. I was thinking of visiting Kathmandu between 21-25th August to see the temples there as well as those in Patan and Bhaktapur. I am not into hiking or trekking, would just like to walk leisurely around the squares etc. My only concern is whether the roads in Kathmandu are too steep or walkable enough for someone with shortness of breath and heart problems? Thanks in advance.