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Many years ago I remeber attending a model railway exhibition and one of the railways was a Lego monorial that looked very "space" based. I've found 6990 (Monorail Transport System) and 6991 (Monorail Transport Base) but I can't find out what sub-theme they came under. enter image description here

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up vote 8 down vote accepted

BrickSet lists 6990 under the Futuron space sub-theme and 6991 in the Unitron space sub-themes.

There was also a Monorail sub-theme of City.

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Did not know about the City subtheme. Thanks! – tombull89 Jan 13 '12 at 10:59

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