A man can dream, can't he?
A module printed exclusively in the United Kingdom by TSR UK. Using the 1986 National Garden Festival as its theme, this module was sold both at that festival, and at the 1986 Games Day RPG convention at the Royal Horticultural Society Hall in London (hosted by Games Workshop that Saturday, September 27th). The module uses the actual map of the National Garden Festival event, held at Stoke on Trent (presumably where the code "ST" comes from), and translates such features as the parking lot into a "grey wasteland surrounding the universe". It is composed of a wrap-around cover (that bears the full-color map) and a 16-page booklet with a 4-page pull-out section. It contains three new monsters: the Iffanbutt, Shadow Wolves, and the Snap Dragon. The adventure itself is humorous and whimsical (similar to the style of Dungeonland and Land Beyond the Magic Mirror). This is one of the rarest, obscure, and most valuable TSR modules, mainly due to its extremely limited availability (only at the UK convention) and small print run (speculated at 250-500). The picture shown upper right is of the actual module for sale here. The spine has several small creases, however the rest of the module and the interior are in excellent to mint condition.
The price? $2,995. Wow. Wow. Wow.