Sacyr's Blog

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More than 70% of the Earth’s surface is covered by water, according to the US Geological Survey. While theoretical concepts of underwater cities have been put forward to take advantage of this enormous space, to date no such large-scale city has been built.

In addition to 775 rooms, Buckingham Palace has a cinema, a swimming pool, a post office, a chapel, a doctor's surgery and even a cash machine. We look at how the British crown intends to renovate this historic building and reduce its carbon footprint.

To carve the ancient city of Petra into sandstone walls, while protecting the lives of workers, the Nabataeans resorted to carving giant steps in the mountain. With their ancestral engineering (and work safety) techniques, this nomadic people created the monuments of this emblematic architectural treasure in the middle of the desert two millennia ago.

In the face of rising sea levels and a shortage of housing, making the oceans habitable is an enticing goal. Various projects aspire to enlarge the city of Manhattan into the sea with artificial, self-sufficient floating islands.