My first international website! :) I actually did this a couple years ago and it’s gone through a couple different iterations.
The condo is owned by a friend of mine who lives in San Diego, but bought a condo in Loreto Mexico on the Baja Peninsula. She needed a site that would show the beauty of the area, the amenities of the condo and allow perspective people to request more information and even make reservations. I took a pretty basic open source calendar program, tied it to a database that would show a different background color for days that the condo was booked and allow the owner the ability to manage reservations from a back end web page. Pretty slick, really. I’ve used a similar system for a reservations system for LVPheasants.com.