Iron Boots

Iron Boots are an item found in three of the four 3D Zelda games. Although they do not seem like a very intuitive item, they have a variety of uses throughout the games. They can be equipped to make you extremely heavy, enabling you to walk along lake bottoms, force your way through tough wind currents, hurt enemies, and exclusively in Twilight Princess, walk along walls and ceilings using magnetic forces.

Ocarina of Time
They can be found in the Ice Cavern in Ocarina of Time. Equipping Link with the Iron Boots, especially when repeating it over and over such as in the Water Temple, is a tedious task for players, forcing them to constantly pause the game to switch boots. When equipped, they make you walk very slowly due to their extreme weight, but you can go at the bottom of lakes and other sources of water, and if you do, you will not walk slowly. Remember to wear the Zora's Tunic, or you will drown after around one minute. They are extremely useful in the game for getting through the Water Temple, although they are completely unnecessary for experienced players. They are also very useful in the Shadow Temple, as they enable Link to walk against the fan currents.

The Wind Waker
The Iron Boots are also found in The Wind Waker. Although you cannot wear them in water, you can use the Iron Boots to avoid being influenced by the wind making them required for the Wind Temple. They also allowed you to activate a springboard. Thankfully in the Wind Waker, the Iron Boots were an item assignable to X, Y, or Z, making taking them on and off a lot easier than in Ocarina of Time.

Twilight Princess
They once again make an appearance in Twilight Princess. They are found in the Mayor's house in the village of Ordon after defeating him in a nice, friendly Sumo Match. Likewise to Wind Waker, they are also an item assignable to specific buttons. They are used to ward off the Gorons on your way up Death Mountain as well as the secret to defeating the Goron Elder, Gor Coron, granting you access to the Goron Mines. They are also need to defeat the confused Dangoro and Fyrus, the temple's boss and the Goron's patriarch originally called Darbus until being corrupted by the Fused Shadow.

The major difference between the Iron Boots in Twilight Princess compared to previous The Legend of Zelda games is that the Iron Boots are magnetic and allow Link to walk on roofs and walls that possess a certain material used in the Goron mines. They are also required to complete the Lakebed Temple, and they allow you to use Water Bombs while underwater. In the City in the Sky, they can be used similarly to the Iron Boots in The Wind Waker to hold Link steady in strong gusts of wind. Also, you can roll with them on and hurt enemies. The Magic Armour of TP weighs Link down like the Iron Boots when it has run out of Rupees.