I did a graphviz visualization of cross-az latency for all azs here https://xkyle.com/Measuring-AWS-Region-and-AZ-Latency/ https://xkyle.com/Measuring-AWS-Regio

I did a graphviz visualization of cross-az latency for all azs here https://xkyle.com/Measuring-AWS-Region-and-AZ-Latency/ https://xkyle.com/Measuring-AWS-Region-and-AZ-Latency/ (gosh, 4 years old now)