Puzzles in the Tower of Hera make frequent use of the Hammer, as well as Crystal Switches. Link sometimes must merge with a wall to slip to the outside of the tower and continue his ascent from there.
As part of the A Link Between Worlds DLC, the Tower of Hera can be found on the Hyrule portion of the Lorule Adventure Map. It is where the scenario "Final battle! Defeat the beasts i the Tower of Hera!" can be found.