Dragonstone is a fictional island in the A Song of Ice and Fire series by George R.R. Martin and is prominently featured in the television adaptation, Game of Thrones. It is located off the coast of Westeros and serves as the ancestral seat of House Targaryen. The island is known for its volcanic landscape and the imposing castle that sits atop it. The castle of Dragonstone is characterized by its black stone architecture and dragon motifs. Historically, it was the first landing place of Aegon the Conqueror when he invaded Westeros. The island plays a significant role in the political and military strategies of various factions throughout the series.