Hyrule Castle Rooftop
The Hyrule Castle Rooftop is a location featured in Twilight Princess. As the name suggests, this location is situated on a section of rooftops making up the exterior of Hyrule Castle. The main purpose of the rooftops is to connect the Castle Town Sewers to Princess Zelda's Chambers, thus making it a pivotal location. This particular section of the Hyrule Castle seems to be broken in sections, which could be due to ongoing construction or the kingdom succumbing to Twilight.
Story
Link uses this area as a road to Princess Zelda's Chambers, where he can find Princess Zelda. During his imprisonment in Hyrule Castle, Link meets a mysterious figure, Midna. She helps Link escape the Castle Town Sewers, which eventually lead to the rooftops. Here Link first experiences the setting of perpetual Twilight, as it has now shrouded the kingdom. The rooftops are very treacherous to navigate due to the broken platforms and multiple enemies that roam the skies, including Shadow Kargaroks. Following the linear path eventually leads to the the chamber, where Princess Zelda awaits the young hero's arrival.
Link has to revisit this area later on in his quest. After the pair encounter Zant within the Lanayru Spring, the Usurper King gravely injures Midna and sets a curse on Link. Link, now suspended in Wolf form, must seek the help of Princess Zelda. To do so, he must once again navigate his way through the Castle Town Sewers and on to the rooftops. This visit is largely identical to the hero's first visit. However, the Twilight is no more and because of this, normal Kargaroks roam the skies, in comparison to their Twilight equivalents.