How has this not collapsed over the years?

Ireland Strange Castle

https://i2.wp.com/www.sycmu.com/wp-content/uploads/2017/05/Castle-House-Island-Ireland.jpg?fit=236%2C364https://i2.wp.com/www.sycmu.com/wp-content/uploads/2017/05/Castle-House-Island-Ireland.jpg?resize=150%2C150SYCMUArchitectureTravel - Places to SeeAmazing Places,beautiful castlesHow has this not collapsed over the years?Best Jokes, Clean Humor, Funny Pics