Turtle Rock is found in the Tal Tal Mountain Range on Koholint Island. When Link reaches the entrance, he will find it blocked by a turtle's head of carved stone. By this point in his adventures, he should have acquired the Ocarina and the Frog's Song of Soul, which he must play to induce the Head of the Turtle to attack him. He must then defeat the Head of the Turtle through the use of his sword, which will then allow him to enter the dungeon.
True to its name, the Turtle Rock dungeon is in the formation shaped like a turtle. Many of the rooms in Turtle Rock are encased in ice and Link will not be able to traverse them until he has located the Magic Rod concealed somewhere inside the dungeon. Once he defeats the dungeon boss, Hot Head, he will receive the eighth and final Instrument of the Sirens, with which he can wake up the slumbering Wind Fish. There are also many magma pools within the dungeon, as well as many mini-bosses from previous dungeons.
As part of the Link's Awakening DLC, Turtle Rock appears as a square on Koholint Island DLC Adventure Mode map. Like in Link's Awakening, the Thunder Drum Item Card can be obtained in the scenario located on Turtle Rock square. If the player obtains an A Rank in the scenario, Young Link's Level 4+ Sealed Weapon can be obtained which unlocks his Level 4+ Mask. Additionally the Dreamer Top Fairy Clothing option for Companion Fairies and Delicious Water Fruit also be obtained in the scenario as well.