Egypt has unveiled its colossal new State Strategic Command headquarters, dubbed "Octagon," dwarfing the US Pentagon in size.

In the depths of the Fram Strait between Greenland and Norway's Svalbard, scientists have been perplexed by a peculiar phenomenon: mysterious octagon-shaped marks imprinted across the seabed. These ...

In the mid-19th century, a quirky architectural fad swept the country: the octagonal house. Homes shaped like octagons were said to be healthier and more efficient than conventional houses — and some ...