I'm very much interested in sound walks, and sound art pieces that require the listener to engage with their environment. For really really good examples of these, check out Kits Beach Soundwalk by Hildegard Westerkamp (1989), and Alter Bahnhof Video Walk by Janet Cardiff and George Bures Miller.
Every year, there's a "Get-Together" of composition students at University of Southampton, with guest composers and musicians, at which pieces are presented, discussed, and workshopped. Last year I created a sound walk through the gardens and nature reserve on the university campus.
This year, it's a piece called KX100 (Mk1). The piece is to be experienced in a particular phone box on campus, and involves phone calls to the past, and the future, all couched in a (perfectly safe!) chaos magick ritual. I'm looking to start a series of pieces that explore sounds made in ordinary places of magickal significance, and phone boxes are definitely magickal places, as you'll hear on the recording.
Over the next week or so I'm going to adapt the piece so it can be experienced in any KX100 kiosk (like the one pictured at the top of the page), but you're welcome to check it out now and give it a go!