Cassandra's Stronghold is a location from Tangled: The Series. It was made from the Black Rocks themselves upon Cassandra casting the Moonstone's second spell of darkness. It stands in the exact spot where Rapunzel's Tower used to be and is roughly three times its size.
- The way Cassandra builds her stronghold is similar to the way Elsa does in Frozen.
- Cassandra is able to use her moonstone abilities to create a personal elevator whenever she needs to get around the tower.
- Only Cassandra and the people she allows are able to enter the tower.
- Around the end of Cassandra's Revenge, Rapunzel gains the ability to destroy the black rocks, implying that she can now force her way into the stronghold.