The two second opinion of what is interesting about Guayaquil, Ecuador.
I believe that Guayaquil was a benchmark location for the importation of slaves to work in the banana, coffee, etc fields of South America. There is an interesting mix of very white people and very black people. Like there used to be a lot of white slave owners and then the slaves. This contrast I have only seen in Porto Alegro, Brazil where maybe the same is true.
I always notice the color of skin, the make up of the population, their height, length of noses, etc. because these are signs of the underlying cultures. A Mestiszo or half white and indigenous is different than a person that has never intermarried.