A medieval theme park under an airtight plastic bubble, entry and exit via airlocks. Filled with Helium-Oxygen mixture.
Featured would be (among others) Hyde park, a theater performing shakespearean tragedies and a session of the house of parliament.-- neelandan, Nov 27 2002 Hyde Park? Presumably for visitors to go and see Squeakers' Corner...-- friendlyfire, Nov 27 2002 Is nitrous oxide flammable?-- bristolz, Nov 27 2002 Replace helium with methane,might empty the place however it would be a 'gas'-- skinflaps, Nov 27 2002 That would be explosive (but not, actually, smelly).-- DrCurry, Nov 27 2002 "Follow the Yellow Brick Road!" (I couldn't resist.)-- Ander, Apr 12 2016 random, halfbakery