We had a very enjoyable stay at Casas Bioclimáticas Iter.
Each house within the complex is a unique example of innovative, environmentally-sensitive design, created by architects from around the world a decade or so ago as part of a design showcase.
The development is well-maintained and dominated by wind turbines and solar panels. This semi-industrial environment (with the constant, mesmerising sound of the turbines and the less romantic noise from the nearby airport) certainly won't suit everyone, but if you 'get' the idea you'll find the experience a fulfilling one. A sandy beach and the volcanic caldera of Montaña Pelada are a walkable distance away.
Our house was very spacious, stylish, clean and comfortable with all the mod-cons (kitchen appliances, tv, patio furniture, adequate wifi etc).
As each house is different, expect novel materials and layouts, and we would recommend a little research to make sure they're right for you, but found that exploring the architecture was a real highlight of our holiday. After booking with hotels.com you can select your house directly (for a supplement) - although we were happy to take potluck.
The staff were very helpful, although the reception area was badly signposted. We regret missing the onsite visitors centre to find out more about the project.
10 minutes drive from the airport and supermarkets and a few minutes from the motorway - a unique base to explore Tenerife.