Courtesy Nelson Garrido
Nelson Garrido has spent over four years documenting the effects of the Portuguese financial crisis on the country's housing.
Courtesy Nelson Garrido
He photographs empty homes across the country in his "Home Less" series.
Courtesy Nelson Garrido
"With the beginning of the real estate crisis, construction of new houses almost stopped and a lot constructions were left unfinished," Garrido explains. "Others, which were actually completed, were never sold or occupied."
Courtesy Nelson Garrido
Garrido shoots one image per day, always at dusk.
Courtesy Nelson Garrido
"This is when you start to notice people's presence in a building. They turn on the lights as they arrive home," Garrido says.
Courtesy Nelson Garrido
In the past, Garrido has photographed the Paiva Walkways in Arouca, Portugal, and abandoned industrial sites.
Courtesy Nelson Garrido
"Home Less" will be on view at the "Time -- Space -- Experience" exhibition at Palazzo Bembo during the 2016 Venice Architecture Biennale, until November 27.

Editor’s Note: This article was originally published by The Spaces, a digital publication exploring new ways to live and work.

CNN  — 

A single light illuminates a gloomy housing block in Portugal, casting a haunting glow over its abandoned shell. Is there life inside this monolith after all?

Abandoned architecture: Exploring Italy's deserted building sites

“The light reminds us of the difference between what reality is and what it should be,” says photographer Nelson Garrido, who has spent over four years documenting the effects of the Portuguese financial crisis on the country’s housing stock.

“A lot of people became homeless after the crisis. This was my way to represent them.”

Garrido captures everything from empty multi-storey blocks to detached homes across the country for his aptly titled “Home Less” series.

Courtesy Eric Holubow
Chicago-based urban exploration photographer Eric Holubow has traveled across America photographing abandoned and forgotten sites.

The Uptown Theater in Chicago, Illinois
Courtesy Eric Holubow
His 2014 book, Abandoned: America's Vanishing Landscape, features 100 forgotten sites, from churches to prisons.

Eastern State Penitentiary in Philadelphia, Pennsylvania
Courtesy Eric Holubow
Though most of Holubow's photos are of America's Rust Belt (the former industry states around the north-east), he has photographed towns and cities around the country.

Brew house at the Schlitz Industrial Park in Milwaukee, Wisconsin
Courtesy Eric Holubow
Many of Holubow's photos come with detailed descriptions about the history and current status of the sites depicted. (This hospital, for example, may be demolished by its current owner, the University of Chicago, to make way for hotels.)

Doctors Hospital in Chicago, Illinois
Courtesy Yves Marchand & Romain Meffre
Photography duo Yves Marchand & Romain Meffre are best known for their award-winning series The Ruins of Detroit documenting the decay of the city's once-proud structures.

Waiting Hall, Michigan Central Station, 2008 (Detroit, Michigan)
Courtesy Yves Marchand & Romain Meffre
The photos, taken between 2005 and 2010, speak to a larger story about the death of industry and the impact of changing economies.

Michigan Central Station, 2007 (Detroit, Michigan)
Courtesy Yves Marchand & Romain Meffre
"[Detroit's] splendid decaying monuments are, no less than the Pyramids of Egypt, the Coliseum [sic] of Rome, or the Acropolis in Athens, remnants of the passing of a great Empire," the photographers write on their website.

Ballroom, Lee Plaza Hotel, 2006 (Detroit, Michigan)
Courtesy Yves Marchand & Romain Meffre
Their next exhibition, a series of abandoned American cinemas called Theatres, will run from October 10, 2015 to January 3, 2016 at the Cultuurcentrum Caermersklooster in Gent, Belgium.

United Artists Theater, 2005 (Detroit, Michigan)
Courtesy Niki Feijen
Dutch photographer Niki Feijen has been photographing desolate places -- from abandoned European castles to the Chernobyl Exclusion Zone in Ukraine -- since 2007.

Dining room in an abandoned luxury hotel
Courtesy Niki Feijen
Since then, Feijen has published two books of his work: 2013's Disciple of Decay and 2014's Frozen, the first of which sold out within months.

Golden Theater - Abandoned Art Deco theater
Courtesy Niki Feijen
Feijen is typically reticent to disclose the location of the buildings he shoots out of fear that they'll attract graffiti artists, vandals and thieves.

Chambre du Commerce
Courtesy Niki Feijen
In November, Feijin will present at Hamburg's Affordable Art Fair.

Speculum - An abandoned school
Courtesy Johnny Joo
Ohio photojournalist Johnny Joo may only be 25, but he's already well known for his ruins photography.

St. Peter and St. Paul Catholic Church in Pittsburgh, Pennsylvania
Courtesy Johnny Joo
Joo says he's been involved with urban exploration (visiting abandoned sites in cities) since he was 16.

Warner & Swasey Observatory in Cleveland, Ohio
Courtesy Johnny Joo
He now blogs extensively about his experiences and photography projects on his website, Architectural Afterlife.

East Central Station in Buffalo, New York
Courtesy Johnny Joo
Last year, Joo released Empty Spaces: Photojournalism through the Rust Belt, a collection of some of his greatest photos.

J.N. Adam Memorial Hospital for Tuberculosis in Perrysburg, New York
Courtesy Rebecca Bathory
Londoner Rebecca Bathory worked as a fashion photographer before turning her lens to abandoned buildings in 2012.

Symphony of Silence
Courtesy Rebecca Bathory
She rose to prominence in 2014 with Soviet Ghosts, a book of buildings abandoned after the collapse of the USSR.

Blue Christ Church in Belgium
Courtesy Rebecca Bathory
Unlike other photographers featured here, Bathory also stages photo shoots with models in abandoned buildings.

Abandoned Victorian Manor
Courtesy Rebecca Bathory
Bathory, who has an MA in fashion photography, is currently completing a PhD in visual anthropology at Roehampton University in London.

The Ark - An abandoned synagogue in the UK
Courtesy Matt Emmett
British photographer and Pentax ambassador Matt Emmett, who runs a site called Forgotten Heritage, has been shooting abandoned spaces for the last four years.

Back Stage Pass - A Belgian power plant that shuttered in 2007
Courtesy Matt Emmett
He also highlights historic sites that at risk of being forgotten.

Patient Records - An asylum in Northern Italy
Courtesy Matt Emmett
For Emmett, there's a strange beauty in the derelict.

"The textures and colors present in different forms of decay make for beautiful imagery," says Emmett of this photo.

Extreme Decay: A townhouse in Belgium
Courtesy Matt Emmett
His first book, Forgotten Heritage Vol. 1, is set to be published next year.

Italian Villa - Abandoned villa in northern Italy

”[‘Home Less’] goes beyond the revelation of ruins,” Garrido explains. “It intends to provide an experience of place.”

Head to The Spaces to find out more about Nelson Garrido’s “Home Less” series.

“Home Less” is on view at the “Time – Space – Experience” exhibition at Palazzo Bembo during the 2016 Venice Architecture Biennale, until November 27.