A new part vertical part of the Yarkon cemetery is shown on Oct. 6 outside of the city of Petah Tikva, Israel. (Associated Press)

At first glance, the multi-tiered jungle of concrete off a major central Israeli highway does not appear unusual in this city of bland high-rises. But the burgeoning towers are groundbreaking when you consider its future tenants: They will be homes not for the living but rather the dead.

With real estate at a premium, Israel is at the forefront of a global movement building vertical cemeteries in densely populated countries. From Brazil to Japan, elevated cemeteries, sometimes stretching high into the sky, will be the final resting place for thousands of people. They are now the default option for the recently departed in the Holy Land.

After some initial hesitations, and rabbinical rulings that made the practice kosher, Israel’s ultra-Orthodox burial societies have embraced the concept as the most effective Jewish practice in an era when most of the cemeteries in major population centres are packed full. “The source of all this is that there is simply no room,” said Tuvia Sagiv, an architect who specializes in dense burial design. “It’s unreasonable that we will live one on top of the other in tall apartment buildings and then die in villas. If we have already agreed to live one on top of the other, then we can die one on top of the other.”

Yarkon: Making room by building up

The Yarkon Cemetery on the outskirts of Tel Aviv has been Sagiv’s flagship project. As the primary cemetery for the greater Tel Aviv area, its traditional burial grounds are at near capacity with 110,000 graves stretched across 150 acres. But thanks to an array of 30 planned vertical structures, Sagiv said the cemetery will be able to provide 250,000 more graves without gobbling up any more land, providing the region with 25 years of breathing room.

Israelis saving space Only in Israel does the global trend for vertical cemeteries appear to be part of a government-backed master plan. Aside from those who have already purchased their future plots, individual outdoor graves are no longer offered to the families of the more than 35,000 Israelis who die each year. Space-saving options include: Shared headstones: putting graves on top of each other – separated by a concrete divider – and have a shared headstone. This is common among couples and even whole families, and every new pit dug in Israel has room for at least two graves in it. Wall niches: stacking the dead above ground into niches built into walls, a bit like in a morgue, but adorned with headstones. Tiered buildings: burying the dead in a building where each floor resembles a traditional cemetery, without the blue sky above.

“It takes some getting used to,” he admitted, as he stood on the roof of the first completed 22-metre-high building, “but it just makes the most sense.”

For now, the interior of the grey buildings looks mainly like a construction site. They feature circular ramps, and a terrace-like facade with vegetation. Each floor has openings on the sides for fresh air to get in.

‘God gave us land for living, not for dying’

For the upheaval in burial practices to take off in Israel, though, the blessing of the rabbis was needed. Israel’s rabbinical authorities oversee all burials of Jewish Israelis.

The Jewish burial ritual is based on the passage in Genesis in which God banishes Adam and Eve from the Garden of Eden: “For dust you are – and to dust you shall return.” Jewish law stipulates that all bodies be buried separately on a layer of dust and earth.

Yaakov Ruza, the rabbi of the Tel Aviv burial society, a semiofficial organization that oversees Jewish burials, said the new forms of burial have been endorsed by leading Jewish ultra-Orthodox figures. The towers, for instance, have pipes filled with dirt inside their columns so that each layer is still connected to the ground.

In many ways, Ruza said the new types of burial represent a return to the Holy Land’s ancient origins of burying inside caves and catacombs. Jerusalem’s burial society even has plans to dig an actual underground cave to find more room for the dead.

Proponents say the new system is more sustainable, environmentally friendly and user friendly – providing a more comfortable visiting experience. But resistance has emerged from a public wary of change. In one famous case, a bereaved family threatened a cemetery official that if their loved one was put in a wall they’d put the official in a wall too.

Officials say those who insist on traditional burial will still have that option; they’ll just have to drive a little further and pay for it. “We are all in favour of burying in the open field so long as it does not infringe on our lives. So if there is no more room to build homes in Jerusalem, I prefer burying in layers,” said Chananya Shahor, manager of the Jerusalem burial society. “God gave us land for living, not for dying.”

Gravedigger Juan Luis Cabrera takes a break from his work at the"Nueva Esperanza" cemetery in Lima on Sept. 9, 2013. (Associated Press)

Density and the dead

Cemetery overcrowding presents a challenge the world over, particularly in cramped cities and among religions that forbid or discourage cremation. The reality of relying on finite land resources to cope with the endless stream of the dying has brought about creative solutions.

The world’s tallest existing cemetery is the 32-story high Memorial Necropole Ecumenica in Santos, Brazil. In Tokyo, the Kouanji is a six-story Buddhist temple where visitors can use a swipe card to have the remains of their loved ones brought to them from vaults on a conveyer belt system.

Two people walk past Washington Cemetery in the Brooklyn borough of New York on Oct. 13, 2014. The predominantly Jewish cemetery dates back to the late 1800's and is almost filled to capacity. (Associated Press)

A employee at the Necropole Ecumenica Memorial cleans the surface of crypts in Santos, Brazil, on Oct. 13, 2014. When completed, the five-building memorial known as a vertical cemetery will hold 180,000 bodies. (Associated Press)

An elderly man bends over a tomb at a Chinese cemetery during Qingming Festival in Singapore in April, 2012. (Associated Press)

Cemeteries stand cheek-by-jowl with residents of Cairo’s City of the Dead, a slum where half a million people live. (Associated Press)

Buses drive on a motorway over the Montmartre cemetery in Paris on Oct. 13, 2014. (Associated Press)

What does the future hold?

Versions of stacked cemeteries already exist in some shape or form in places like New Orleans and across Europe, in Egypt’s Mountain of the Dead, in China and in the amphitheatre-like Pok Fu Lam Rd Cemetery in Hong Kong.

But the future will likely look more like the ambitious plan of Norwegian designer Martin McSherry for an airy cemetery skyscraper that looks like a gigantic honeycomb with triangular caverns.

Other plans for cemetery towers have been presented for Paris and Mumbai. In Mexico City, another big project has been proposed: the Tower for the Dead, which will combine a vertical necropolis and an 250-metre-deep subterranean complex. In China, Beijing residents have been provided subsidies to buy space in vertical cemeteries.