Definitely not a hobby shop, and the transport connection is a little tenuous.
Recently opened at the top of the Gotthard Pass is one of the former Swiss fortresses built during WWII, now rebuilt and restored. The lower level is now a series of environmental exhibitions and displays, while the upper level is the restored military establishment with its 15cm guns to defend the San Giacomo pass from invasion from Italy.
The transport is the funicular that connects the two levels, which is (I am told) the highest "metro" in Switzerland.
Everything is inside the mountains except for a new viewing platform from which the gun positions can be seen.
For those who are familiar with the Hotel Frohsinn, its former genial host, Paul, is one of the guides.
I can recommend walking down from the viewing platform to the Gotthard Pass buildings - very peaceful.
An article with pictures is posted on the Swiss Railways Society website (www.swissrailsoc.org.uk).