If you have a hi-fi a TV, cellphone, computer and digital camera you already own several sets of speakers, amplifiers, microphones, screens and cameras. The idea of modular gadgets appeals on multiple levels, from Zen minimalism to the joy of playing with Legos.Here are some of our favorites.

A perfect environmental nightmare, these hellish looking open faced mining machines have been largely decommissioned. Luckily some are being preserved as they are staggeringly impressive. The Ferropolis in Germany has many of these machines on display and forms an industrial park which host the famous MELT music festival. There have been several images of these floating around blogs, including the infamous pictures of the bucket wheel excavator that swallowed a full sized bulldozer, however we have tried to find as large a variety as possible.

Todays welding is a long way removed from the video included here of forge welding at the beginning of the 20th century., where dissimilar metals were headed and beaten together with hammers. State of the art robotic welding machines can perform an intricate ballet of hi tech gadgety bravado, including the incredible remote welders which are shown spot welding materials several feet away, with laser beams.

Architect of the Lego House built for Top Gear presenter James May, Barnaby Gunning, has sent us pictures of the construction progress so far. We'll post more as we get them.