This concrete Second World War bunker in Hamburg has been converted into a renewable energy plant and visitor centre by urban development company IBA Hamburg (+ slideshow). More about Abandoned concrete bunker converted into a green power plant by IBA Hamburg
A raw concrete house in Alicante by Spanish studio Langarita-Navarro Arquitectos becomes the scene for a string of mysterious murders in this series of images by photographer Luis Diaz Diaz (+ slideshow). More about Concrete house by Langarita-Navarro photographed as a crime scene
Glass floors allow residents to look down from a dining table into a toilet inside this windowless concrete house in Shanghai by Chinese firm Atelier FCJZ (+ slideshow). More about Vertical Glass House by Atelier FCJZ has glass floors instead of windows
A pointed arch punctures the red concrete facade of this Portuguese visitor attraction designed by Lisbon architect Gonçalo Byrne to present the history of a fourteenth century battle between Portuguese and Castilian forces (+ slideshow). More about Red concrete visitor centre by Gonçalo Byrne tells the story of a Portuguese civil war battle
London architecture studio ShedKM used walls of locally quarried red sandstone to help this concrete house in north-west England fit in with its coastal surroundings (+ slideshow). More about Coastal concrete house on a red sandstone base by ShedKM
A rooftop swimming pool with a glass floor cantilevers out beside the entrance to this house in Marbella, Spain, by Dutch office Wiel Arets Architects (+ slideshow). More about Wiel Arets' Jellyfish House features an elevated swimming pool with a glazed underside
Japanese firm Atelier HAKO Architects used concrete dotted with formwork impressions for both the internal and external surfaces of these stacked residences in a suburb of Tokyo (+ slideshow). More about Concrete homes patterned with formwork holes by Atelier HAKO Architects
This symmetrical concrete house by Chilean studio Pezo Von Ellrichshausen is the first in a series of 12 holiday homes underway in the Spanish canton of Matarraña and will be followed by others designed by Sou Fujimoto, Didier Faustino and more (+ slideshow). More about Pezo von Ellrichshausen's Casa Pezo is first of 12 architect-designed dream houses
Faceted concrete blocks protrude from one side of this sports hall in Croatia, while its bumpy southern and western walls were made by casting concrete panels over a bed of stones (+ slideshow). More about Concrete-clad sports hall by Idis Turato features both faceted and bumpy facades
This movie shows how a redundant Second World War bunker in the Netherlands was turned into a sculptural visitor attraction by slicing it down the middle to reveal its insides. More about Movie shows concrete bunker cut in half by RAAAF and Atelier de Lyon
This concrete house in Tokyo was designed by Japanese firm Apollo Architects & Associates for a family that regularly accommodates foreign exchange students (+ slideshow). More about Concrete Calm house by Apollo Architects designed to accommodate exchange students
A bridge over a stream connects the two sides of this concrete house in India by Mumbai firm Architecture Brio (+ slideshow). More about Concrete house by Architecture Brio that straddles a stream in India
Swedish designers Toki Drobnjakovic and Per Sundberg have renovated an underground strip club in Stockholm to create a workplace where walls are embellished with concrete set against bubble wrap (+ slideshow). More about Office in a former strip club featuring concrete cast against bubble wrap
An indoor courtyard with an earth floor and central tree is concealed behind the concrete walls of this bulky house in Hiroshima by Japanese studio Suppose Design Office (+ slideshow). More about House in Yagi containing an indoor courtyard by Suppose Design Office
Chilean architect Ricardo Torrejón wanted to integrate the garden into this concrete house in Santiago, so he added huge windows at the back and glazed recesses along the front and sides (+ slideshow). More about Casa La Cañada by Ricardo Torrejón
The folded concrete walls of this lakeside visitor centre in China's Anhui Province were designed by architects Archiplein to mimic the uneven surfaces of the surrounding mountains (+ slideshow). More about Tianzhoushan Tea House by Archiplein
Some of the concrete walls of this house in Yokohama, Japan, by Tai and Associates were formed against wooden planks, while some have been rendered white and others have been left plain (+ slideshow). More about House in Shinoharadai by Tai and Associates
A hotel under construction on a South Pacific island is depicted as a collection of architectural ruins in this series of images by Australian photographer Peter Bennetts (+ slideshow). More about La Plage du Pacifique Hotel by Kristin Green photographed by Peter Bennetts
A combined car park and terrace covers the roof of this hillside house in Los Angeles by Californian studio Anonymous Architects (+ slideshow). More about Car Park House by Anonymous Architects
This house near Mexico City by local office MMX Studio comprises an assortment of exposed concrete buildings arranged around small gardens and courtyards (+ slideshow). More about Cap House by MMX Studio