The Freehouse is not an ordinary treehouse. Instead of building a house outside of the tree... the Freehouse is inside a tree! The large, hollow Redwood Deadwood was discovered in the Land of the Ants (what it looked like in 2006) and within months, converted into a house for Max. It is five stories tall.
From here, you can travel to...
A general living space. Includes a table, cabinets, a table with a fancy red and white checkered tablecloth and chairs, stove, a pantry, and a minifridge. Most objects in the house are smaller than normal. (box cabinets, two-burner stove with a small oven, etc.) Also has a few board games and a kittykat bed.