Often overshadowed by its neighbor, the Taj Mahal, Agra Fort is a notable 16th-century Mughal fortress that served as the primary residence of the emperors for generations. This UNESCO World Heritage Site is a city within a city, featuring a 2.5-kilometer-long enclosure of red sandstone walls that hide a world of opulent white marble palaces and serene gardens. Beyond its military might, the fort holds a poignant history; it is where Emperor Shah Jahan was famously imprisoned by his son, spending his final years gazing at the Taj Mahal from the balcony of the Musamman Burj. - AsNotedIn