The Castalia Pond, otherwise known as the Castalia Duck Pond, is a spring-fed pond that never freezes. Castalia Pond plays host to many birds all year round, but, during winter, especially when Lake Erie freezes, many more waterfowl temporarily take up residence.
The Blue Hole is another spring-fed water feature of Castalia. For many years it was open to the public, but, since 1990, it has not been open to visitors.
Castalia is in the Margaretta school system.