The Kingdom of Adarlan is a fictional realm in the book series "Throne of Glass" by Sarah J. Maas. It is known for its powerful monarchy and military strength, ruled by the tyrannical King of Adarlan. The kingdom is characterized by its vast landscapes, including cities, forests, and mountains, and is home to various cultures and peoples. Adarlan is also marked by its oppressive regime, which seeks to conquer neighboring lands and suppress magic. The kingdom's capital, Rifthold, serves as a central hub for political intrigue and conflict, where many key events in the series unfold.