Kalkan isn't a big place and ABI travel is pretty much in the middle. If you're travelling independently your bus will either drop you in the center of town or on the Fethiye - Antalya road. From the bus stop you just walk down the hill into the center and ABI is just 10 yards or so down the pedestrian alley in front of you. From the highway you'll need to walk into town (5 minutes). The location is shown on the map on the HiTiT Kalkan page. Of course, you can always call the office first and somebody will help you out.

Don't forget, ABI can help you with any or all of the following: car hire, transfers, changing currency, hotel pickups and drops, personal tours, extended tours, UK flights, flight confirmations, and having fun.