Spring area (はじまりの森, Hajimari no Mori) is a location in Rune Factory 4. It can be accessed by entering a Dungeon Flower, the seeds of which can be found in Demon's Den in Sercerezo Hill.
Similarly to Sharance Maze, each floor's map is randomly generated, and all monsters will appear in the maze. A random mini-boss (Guardian, Red, Blue, Yellow, Green, Baal, Minotaur King, Ghost Ray, Death Orc, Black Dragon, King Wooly, Master Troll or Big Duck) will appear in each floor, with the exception of the last floor, which will contain a boss, instead.
The level of monsters will vary depending on the level of the Dungeon Flower. The boss found at the end will also scale with the level of the dungeon, with Greater Demon being encountered in lower level dungeons, Octopirate in higher level dungeons, and Grimoire in level 10 dungeons. Aquaticus can be encountered in level 10 giant field dungeons with the dungeon's level being in blue text, only if you allow the dungeon to sit for around 2-3 weeks.
The World of Fields will occasionally have "Treasure Rooms", which the player can find throughout explorations. The chests found can range between 1 to 5 per room, and have a wide selection of items. Rune Crystals, Double and Ten-Fold Steels, Glitta Augite, Round Stone, White Stone, Invistone and Shadestone cannot be found in these chests.
Also similarly to Sharance Maze, occasional items can be found randomly placed on the floor of rooms while exploring. These items can be Love Potions, basic medicines, grass and herbs, Milk Porridge, Hot Milk, Hot Chocolate, Cake, Chocolate Cake or Lamp Squid Sashimi. Vital Gummi, Intelligencer and The Protein can also be scattered around the floor.