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 in the Tower of Hera!" can be found.