The Harry Potter and the Deathly Hallows is probably the only one that doesn’t take place in Hogwarts.
It follows the main three characters through their journey on finding the Horcruxes and destroying them, but they also have to face the challenges that are put up especially, so no one gets them.
They start off promising with an actual house to stay in for a while, but then they messed up so they couldn’t stay there any longer, instead, they used to put up camp and change places occasionally, but they had accomplished quite a few feats in the book.
In the end, they had to go back to Hogwarts to require one of the last Horcruxes, but it starts a war among the teachers, students, and the order of Phoenix against the dark lord and the death eaters, which also deals them quite heavy losses.
The book definitely did end the fantastic series that was going on but the last twist added did steal all the attention.