@PUNKEY,
I generally get the mobile version of a website when I'm browsing on a tablet type device running an Android OS. Sometimes there will be an option to switch to desktop view somewhere on the page, but such is not the case with your museum website. I then typed in the url using the 'm' in the address and the resulting page gave me a choice (mobile or desktop) and the address reads as 'www.gwbhs.com/?mobile-=1'. Webpage content didn't change at all, though.
I'm pretty much an amateur with this stuff, but I think it's a glitch with your browser. Otherwise, clearing your cookies and temp. cache probably would have worked.
You can upgrade IE (I'm not sure what the latest version is) or download any number of other browsers that will suit your needs. HTH.