Who was the only girl pharaoh?

Could you please enlighten me on the fascinating history of the lone female pharaoh who ascended to the throne? Who was this remarkable ruler, and what made her stand out among the many male pharaohs that have graced Egyptian history? Her story must be filled with intriguing details and formidable achievements, given her unique position. I am particularly intrigued by the challenges she must have faced as a woman in a time when power was largely confined to men.