Subrosia
Subrosia is an underground land beneath Holodrum. Its only occurrence has been in Oracle of Seasons. Various portals lead to this underground land and are vital for Link to progress through his journey. When Onox captured Din, he sunk the Temple of Seasons in order to throw the Seasons out of order. The Temple fell down to Subrosia, making it vital that Link return there to upgrade his Rod of Seasons
Enemies
Fire Pokeys can be found when looking for the Bomb Flower or the occasional time when Link is to dig over one of their hiding spots. They can easily be defeated with a few hits from Link's sword.
Items
Many items can be found throughout Subrosia. Some are the usual items that can be found in Holodrum as well - such as Recovery Hearts - but others are only found in Subrosia. By completing the Subrosian Dance, Link acquires the Boomerang, ore chunks or even Gasha Seeds. The Hyper Slingshot is found in the Sword and Shield Maze. Ore Chunks can be found by chopping down grass or digging with your Shovel and is the currency used in Subrosia; rupees are useless there. The Star-Shaped Ore is an item that is dug up using your shovel. You can buy the Ribbon so Rosa will go on a date with you. Magic Rings can be bought at the Subrosian Shop, as can Gasha Seeds and the Member's Card for the Horon Village Shop. In order to gain entrance to the Tower of Autumn and gain access to the furnaces, Link must locate the Bomb Flower and blow away the rocks blocking the Tower of Autumn. Red Ore and Blue Ore can be found in two locations in Subrosia. When smelted together, they create Hard Ore. When taken to the Subrosian Smithy, the hard ore can turn your Wooden Shield into the Iron Shield.
Appearance
Subrosia is lava-filled. Active volcanoes are commonplace around the less populated areas and are known to spew out lava and hot rocks that can cause damage to Link. Despite this, trees are able to grow around certain areas. There is a desert towards the southern end of Subrosia and caves scattered around the land. There are populated areas scattered around Subrosia; the Subrosian Smithy, houses, a shop and furnaces.
Inhabitants
There are two main inhabitants of Subrosia. Their native inhabitants are hooded figures known as the Subrosians. They are immune to heat and like to take lava baths. Part of their culture is dancing and if Link can follow their steps perfectly, he will be rewarded accordingly. Pirates have also taken up residence in the area. These men were once alive but are long dead now, they are but rags and bones. One of them says
"We have not sailed since we were alive!"
This may suggest that their ship somehow crashed into Subrosia and they all died.
Dungeons
The Sword and Shield Maze (level 8) is the only dungeon that can be found in Subrosia. The dungeon's item is the Hyper Slingshot. Beating the dungeon will result in receiving the eighth - and final - essence, the Changing Seasons.