Maplewood

Maplewood (sometimes referred to in MS Paint Hell as Mapedsville) is the primary setting of LOST K3YHOLE, Stray Tangent, and The Golden Key. It appears to be a generic suburb, but is actually one of the deadliest Rainy Towns (second only to Redial City).

Iterations
Throughout the Stray Tangent, Lost Keyhole and MS Paint Hell verses, it has been shown there are actually multiple iterations of Maplewood (some of which are not intended to be serious in any way).

This list will also include locations closely related to Maplewood.

Maplewood, New Jersey (LOST K3YHOLE)
The "first" Maplewood. It resembles an ordinary suburb, bar its anomalous ability: anyone who reenters Maplewood after leaving will instantly forget they had ever left. However, this property was eventually noticed by civilians, and leaving Maplewood was banned. In addition, this also works in reverse: any person who does not consider themself a Maplewood inhabitant who leaves Maplewood will forget Maplewood exists.

The property was nonexistent until 2011.

Schools in Maplewood
All schools in Maplewood contain invisible hatches which lead to Breadverses. However, they can only be accessed by those in possession of Keybones/Golden Keys. Thus they are completely irrelevant to LOST K3YHOLE and are only a plot point in The Golden Key.

UNIVERSE MAPLEWOOD
A possible solution to "How does Maplewood have contact with the outside world at all?" is that Maplewood contains a duplicate of the entire Earth.

Maplewood, New Jersey (Stray Tangent)
Stray Tangent's version of Maplewood is almost identical to the LOST K3YHOLE parallel in terms of non-anomalous structure, with a few exceptions: A phenomenon referred to by Wintergreen as "Fateblocking" occurs in the town:
 * The Maplewood Hospital now owned by the Speedwagon Foundation.
 * The library contains copies of Saga of Mella the Stray Cat
 * The invisible hatches now lead to FAKE MAPLEWOOD and MAPLEWOOD #2.
 * It is impossible to harm stands using other stands.
 * Fate is nonexistent.
 * Stands cannot be awakened.
 * Persons and objects from alternate timelines randomly appear, with certain people (usually their parallels) claiming to remember their existence).
 * Random boundaries occasionally show up, preventing people from exiting or entering. They rarely exist for more then a few days.

FAKE MAPLEWOOD
Fake Maplewood, existing in the Steel Ball Run timeline, is immune to timeline manipulation and roughly twice the age of the universe due to this.