Thanks to an intrepid group of urban explorers, some of the most magnificent hidden engineering triumphs that lie, hidden, beneath the streets of the worlds cities are being recorded and posted on underground (no pun intended) websites.Here are some of our favorite sewers and drains, from Paris tourist attraction sewers to Londons Escher-like, arched, Victorian Gothic drains, to still working ancient Roman systems and the infamous giant storm drains beneath Tokyo. Vote for your faves.

Britain is probably the only country in the world where electric vehicle use is declining, due to the rapid disappearance of the electric milk delivery vehicle, or milk float.Until recently it was common place for milk to be delivered to almost every house in the UK, daily. Presumably in order to secure the national flow of tea. To achieve this a vast army of distinctive, cheap looking, sluggish, electric utility vehicles paraded suburban streets.Here are some different varieties, including new concept vehicles and milk floats from movies, all preserved for posterity.

The two cardboard box halloween outfit is a halloween icon. Why they are always funny, we're not sure, perhaps its the irony of the fact that they are cheap and low tech and without any organic curves. Here are some instruction of how to make your own: 1. Take 2 boxes. 2. Wear them.We not quite sure what to vote on here. Most iconic?

Something went very wrong in the 18th century. A 100 year long attempt to wear the most ridiculous artificial hair involved dandies sporting macaroni and culminated in Marie Antoinette’s utterly mad ship wig. The last vestige of this is the bizarre tradition of British and colonial judges who continue to don 300 year old clothing in a profession which is supposed to be rational.

A gallery of some of the most impressive control rooms, including the original NASA mission control, the Beatles recording studio, the NORAD nuclear war room, what is left of Chernobyl reactor 4 control and control rooms for TV, traffic, subways and particle accelerators.

The design of ski jumps is interesting because it is the most extreme form of a playground slide. It has recently produced excellent pieces of modern architecture from Zaha Hadid and MR2 but equally impressive are the bizarre temporary ski jumps at baseball grounds and football stadia.