Where are all the apps for Windows Phone?

Specifically, apps when you visit tourist attractions, or a supermarket, or a motorway service station? Some discussion by myself on All About Windows Phone:

There’s always been talk of Microsoft targeting developers and promoting their platform, and these can lead to small wins such as bringing over titles from other platforms one by one (Temple Run being an obvious example). Meanwhile, bringing in these big brand names to the Windows Phone platform should not be forgotten as well. Legoland Windsor is owned by Merlin Entertainments in the UK, which owns and runs a huge range of parks, including Alton Towers, Chessington World of Adventure, the Blackpool Tower, and more. If it was to come on board and have mobile apps for its venues also available on Windows Phone, there would be many benefits to the platform.