Argent's Kings Cross Central Limited Partnership has reportedly shortlisted several ideas for the redevelopment of a 25-meter high grade II-listed gas holder at the development next to St Pancras Station.
Despite being decommissioned in the eighties the structure, which overlooks Regent's Canal, cannot be moved and has prompted a competition to decide the best use of the space.
One concept includes a giant slide around the edges of the gas holder and a rooftop trampoline. The trampoline's base would form the roof of a community centre below. The scheme's designer Tarek Merlin, of Feix and Merlin in Southwark, said: "We wanted people to experience the holders up front, up close and at height."
The shortlist also includes a proposal by Hakes Associates for a giant silver ball to act as a mirror in the middle of the gas holder.
There has also been talk of an events venue with gardens and a proposal for a "serene" pavilion and landscaped green space. Ian Lerner, of the King's Cross Conservation Area Advisory Committee, said: "It has to provide a focal point and be used to make sure people stay in the area in the evenings."
Bridget Evans, of the King's Cross partnership's parent company Argent, said: "The gas holders are an important reminder of industrial past. It's exciting that we can blend a new idea with such an important heritage feature."
It seems odd that a structure which has been unused for over 20 years can generate such wacky ideas, but are the suggestions likely to be a success or simply money down the drain?
The winner of the competition is to be named next month.