As many of you guessed correctly, last weekend's Name That Shed was Wireless Cottage, part of the Grade II-listed Lizard Wireless Station at The Lizard, Cornwall. The two wooden huts are over 100 years old and were built by Marconi who used them in his early radio experiments. Now restored, they have been turned into a wireless museum and holiday accommodation run by The National Trust.
Marconi land radio stations were set up in other spots in the US. The Rocky Point Historical Society has useful details on their local shedworking station, pictured below: Guglielmo Marconi and David Sarnoff, President of RCA, are standing outside it in 1933.