Attilan is a fictional city in the Marvel Comics universe, primarily associated with the Inhumans. It is often depicted as a hidden, advanced metropolis located in the Himalayas, where the Inhumans, a race of superhumans, reside. The city is known for its unique architecture and advanced technology, which is often powered by the mysterious substance known as Terrigen Mist. Attilan serves as the home and cultural center for the Inhumans, who undergo transformations through exposure to Terrigen Mist. The city has been ruled by various leaders, including Black Bolt, the silent king whose voice can cause massive destruction. Attilan's isolation and unique society make it a significant location in the Marvel Comics narrative.