Hyrule Castle Tower

Hyrule Castle Tower is the fifth dungeon in The Legend of Zelda: A Link to the Past. It is the highest tower of Hyrule Castle. It leads to the first boss fight with Agahnim, and Link is warped to the Dark World in the end.

Story
After getting the Master Sword in the Lost Woods, Link received a message from Princess Zelda and the priest at the sanctuary: they were under attack. Link went to the santuary, found the priest dead, and Zelda was gone; taken to Hyrule Castle by Agahnim.

After breaking the barrier in front of the tower, Link journeys to the top and finds Zelda being transported to the Dark World. He fights Agahnim, and deflects his attacks back at him. After a number of blows, Agahnim stops the fight and uses his magic to send Link to the Dark World; on top of the Pyramid of Power.