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The Henderson's Ranch · The Creepy Tower · The Creepy Tower Interior · The Creepy Tower Basement · The Swamp Detour · The Fisherman's Ice Lake · The Ice Lake Cave · The Old Mansion · The Missing Island · The Agrabush Alleyway · Schoolhouse Interior · The Jungle Island · The Centre of the Earth · The Servant's Quarters · The Mer-Palace Grounds · The Secondary Caldera · The Agaric Mire · An Innocuous Clearing / The Ant Hill · The Mystery of the Infecting Machines · Crystal Caverns · The Pahti Plant Precipice

This is one of the sites of the Kaine Adventure, The Mystery of the Missing Heirloom. Most of the actual adventuring (and all of the whacking) occurs here.

From the in-game news item: It's time for another exciting Investigator Kaine mystery! This time you're needed in the Seasonal Forest, where an old family Heirloom has gone missing. You'll need to have completed Kaine's Fungal adventure and have unlocked the Summer Village zone before this quest will show up on the Town Crier in the Commons.

This adventure was released on September 2, 2015. Here is the official Codename blog.

An Innocuous Clearing has information on quests, puzzles, etc.