The hot dog stand at the centre of the Pentagon, a Japanese garden ziggurat, a town under Australia, and the building that housed 1% of a country.
Blok P housed 1% of the population of Greenland.
The centre of the Pentagon used to be a hot dog stand.
The Acros Fukuoka is shaped like a ziggurat covered in gardens.
The town of Coober Pedy in South Australia is underground.
For more on interesting buildings, creative engineering, and architectural ephemera, start here: