The Fibonacci sequence, which is the basis for the golden ratio, goes like this:
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144
Each number in the sequence after the first two is the sum of the previous two numbers. Coincidentally, it works as a nearly-accurate converter between miles and kilometers. Look at any number in the sequence as a number of miles and the next number in the sequence is approximately that same distance in kilometers. For example, 8 miles is about 13 kilometers. 13 miles is about the same as 21 kilometers.