The Cisbot's mission is to creep through the city's pipelines and repair areas that could be potentially leaky without cutting off the gas supply to buildings.
The non-profit Reconnecting America has mapped every transit project under construction and planned in the U.S. based on information gathered in 2012.
Lagos, a growing megacity, is trying to move forward and out of poverty with sound transport policies and building infrastructure - but it will have to tackle crime as well to shake what seems like a fearsome reputation.
After almost three years on display, the art gallery within the vacant shops and restaurants on Willoughby Street will be taken down by the end of June.
Untapped Paris got a sneak peak into the Paris underground thanks to a few urban explorers we know.