Videotheque Booth

Very detailed section from Kisho Kurokawa via RNDRD.

Dalene Cabin

Nice detailed section from architect Tommie Wilhelmsen via the Contemporist.

VF-1J Valkyrie Battroid

Great section/schematic/detail/call it what you want.

Via This Place...

I'm Not Sure #2

Perspective drawing from Brady Duncan via Drawing ARCHITECTURE.

Carpenter Hall house

Great detailed sketch of the east elevation of the Carpenter Hall house, Wilston, Brisbane, Queensland.

Courtesy of The University Of Queensland.

Metropol Parasol De Sevilla

Great perspectival detail.
From ArcStreet.

Valve

Just amazing - courtesy of The Retro/Vintage Scan Emporium.

Frank Loyde Wright Column

For the Johnson Wax Building courtesy of architechgallery.com.

08/01/2011 edit: I found a good image of this column.