Coyoacan was a town located 60 miles west of Mexico City.
On the Day of the Dead in 1941, Susini and the Torajenn landed in Costilio Park. From there, they attempted to harvest Coyoacan's citizens for their flesh and skeletons. With the help of Diego Rivera and Frida Kahlo, the Eighth Doctor and Izzy Sinclair stopped the aliens from murdering the town's entire population, but not before a few hundred people were killed.
Before she died, Susini used the skeletons of those that were captured to create a tower near the town's church. This tower was not taken down by the inhabitants of Coyoacan, but instead kept as a reminder of the events of the night.