Architecture collective Frankie Pappas has hidden the 3.3-metres-wide House of the Big Arch within the Bushveld nature reservein the north of South Africa.

The unusual form of the skinny house is a direct result of its unique location within a nature reserve, surrounded by forest and alongside sandstone cliffs.

Frankie Pappas designed the home so that it would be enveloped by the surrounding forest and sit within the canopies of the existing trees.

The house's long, thin shape was determined by the location of the trees so that not even one tree had to be felled during its construction.

"The existing trees completely determine the house's form," said the collective. "The 3.3 metre-wide central space is as thin a building as possible with the required programmes: and this enabled us to thread the building through the treescape," it continued.

"All of the shapes that protrude from the 3.3-metre central spine are sculpted by the openings in the forest."

All of the main living spaces are arranged linearly within a 3.3-metre-wide section that consists of two timber bridges.

These bridges are supported on piers constructed from rough stock brick chosen to resemble with the nearby sandstone cliffs.

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