Build your own tiny house on a short break in Wales

Take one clueless writer keen to join the tiny house movement, add in an eco-friendly course at Machynlleth’s Centre for Alternative technology and the results are … something solid to build on

Watchtowers, drones and a toxic moat: the designs for Trump’s border wall

Some proposals for Trump’s border wall may look like spoofs, but they provide a fascinating window into the lurid anxieties of middle America

A Brittany eco-home with extra gîte and yurt – in pictures

A geobiologist has built this complex of buildings out of eco-friendly materials around a wooden main house, with scope for tourist rentals

Inside Peru’s modern-day Machu Picchu – is this the best new building in the world?

The soaring buttresses and hanging walkways of UTEC in Lima have earned it the RIBA international prize. And Grafton Architects, the Irish team behind it, have equally big plans for Britain