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Ocean Dome
Green Point Park, Cape Town, South Africa, 2015
Permanent installation of 50 gabions (wire baskets) stacked like bricks to form a round tower and filled with plastic waste. The material – collected on the beaches of the Western Cape near Cape Town (Atlantic) – consists of 10,000 bottles, fishing nets, fishing lines and other plastic finds. It is distributed across the gabions, each 0.3 m deep and 1 m² in size, with a total façade area of 50 m². Inside the tower is a 4.5 m high, extremely stable and lightweight load-bearing structure made of 2 mm thick, repeatedly folded, galvanised sheet steel, connected solely with screws.
The construction method and the use of waste as a resource also experiment with its application in “low-cost” architecture. As an art object and place to visit in public space – among other things on guided tours for
school classes – the collected plastic waste illustrates the severe pollution of the oceans, the enormous quantity of the most diverse plastics and their slow decomposition. As a building material, plastic can, for example, contribute to thermal insulation and thus improve the indoor climate. Depending on industrial processing, the material can be returned to the production cycle untreated or separated by type.
Realised with the support of the Bavarian State Chancellery and the Free State of Bavaria.
Collaboration/Funding
City of Cape Town’s Environmental Resource Management Department (ERMD); Paul Carew, PJC Carew Consulting, Cape Town, South Africa; Rothfuss Gabionen, manufacturer, Hemmingen/Stuttgart, Germany

Ocean Dome
Green Point Park, Cape Town, South Africa, 2015
Permanent installation of 50 gabions (wire baskets) stacked like bricks to form a round tower and filled with plastic waste. The material – collected on the beaches of the Western Cape near Cape Town (Atlantic) – consists of 10,000 bottles, fishing nets, fishing lines and other plastic finds. It is distributed across the gabions, each 0.3 m deep and 1 m² in size, with a total façade area of 50 m². Inside the tower is a 4.5 m high, extremely stable and lightweight load-bearing structure made of 2 mm thick, repeatedly folded, galvanised sheet steel, connected solely with screws.
The construction method and the use of waste as a resource also experiment with its application in “low-cost” architecture. As an art object and place to visit in public space – among other things on guided tours for
school classes – the collected plastic waste illustrates the severe pollution of the oceans, the enormous quantity of the most diverse plastics and their slow decomposition. As a building material, plastic can, for example, contribute to thermal insulation and thus improve the indoor climate. Depending on industrial processing, the material can be returned to the production cycle untreated or separated by type.
Realised with the support of the Bavarian State Chancellery and the Free State of Bavaria.
Collaboration/Funding
City of Cape Town’s Environmental Resource Management Department (ERMD); Paul Carew, PJC Carew Consulting, Cape Town, South Africa; Rothfuss Gabionen, manufacturer, Hemmingen/Stuttgart, Germany

Ocean Dome
Green Point Park, Cape Town, South Africa, 2015
Permanent installation of 50 gabions (wire baskets) stacked like bricks to form a round tower and filled with plastic waste. The material – collected on the beaches of the Western Cape near Cape Town (Atlantic) – consists of 10,000 bottles, fishing nets, fishing lines and other plastic finds. It is distributed across the gabions, each 0.3 m deep and 1 m² in size, with a total façade area of 50 m². Inside the tower is a 4.5 m high, extremely stable and lightweight load-bearing structure made of 2 mm thick, repeatedly folded, galvanised sheet steel, connected solely with screws.
The construction method and the use of waste as a resource also experiment with its application in “low-cost” architecture. As an art object and place to visit in public space – among other things on guided tours for
school classes – the collected plastic waste illustrates the severe pollution of the oceans, the enormous quantity of the most diverse plastics and their slow decomposition. As a building material, plastic can, for example, contribute to thermal insulation and thus improve the indoor climate. Depending on industrial processing, the material can be returned to the production cycle untreated or separated by type.
Realised with the support of the Bavarian State Chancellery and the Free State of Bavaria.
Collaboration/Funding
City of Cape Town’s Environmental Resource Management Department (ERMD); Paul Carew, PJC Carew Consulting, Cape Town, South Africa; Rothfuss Gabionen, manufacturer, Hemmingen/Stuttgart, Germany

Ocean Dome
Green Point Park, Cape Town, South Africa, 2015
Permanent installation of 50 gabions (wire baskets) stacked like bricks to form a round tower and filled with plastic waste. The material – collected on the beaches of the Western Cape near Cape Town (Atlantic) – consists of 10,000 bottles, fishing nets, fishing lines and other plastic finds. It is distributed across the gabions, each 0.3 m deep and 1 m² in size, with a total façade area of 50 m². Inside the tower is a 4.5 m high, extremely stable and lightweight load-bearing structure made of 2 mm thick, repeatedly folded, galvanised sheet steel, connected solely with screws.
The construction method and the use of waste as a resource also experiment with its application in “low-cost” architecture. As an art object and place to visit in public space – among other things on guided tours for
school classes – the collected plastic waste illustrates the severe pollution of the oceans, the enormous quantity of the most diverse plastics and their slow decomposition. As a building material, plastic can, for example, contribute to thermal insulation and thus improve the indoor climate. Depending on industrial processing, the material can be returned to the production cycle untreated or separated by type.
Realised with the support of the Bavarian State Chancellery and the Free State of Bavaria.
Collaboration/Funding
City of Cape Town’s Environmental Resource Management Department (ERMD); Paul Carew, PJC Carew Consulting, Cape Town, South Africa; Rothfuss Gabionen, manufacturer, Hemmingen/Stuttgart, Germany


Filling the gabion baskets with plastic waste from the beaches of Cape Town.


Fig. left: assembly of the gabion baskets filled with plastic waste on the tower. The tower consists of pre-galvanised sheet steel folded into thin T-shaped metal profiles and screwed together. Produced in Cape Town.

Filling the gabion baskets with plastic waste from the beaches of Cape Town.


Fig. left: assembly of the gabion baskets filled with plastic waste on the tower. The tower consists of pre-galvanised sheet steel folded into thin T-shaped metal profiles and screwed together. Produced in Cape Town.

Filling the gabion baskets with plastic waste from the beaches of Cape Town.


Fig. left: assembly of the gabion baskets filled with plastic waste on the tower. The tower consists of pre-galvanised sheet steel folded into thin T-shaped metal profiles and screwed together. Produced in Cape Town.

Construction of the supporting structure from thin galvanised sheet steel. The spars of folded sheet metal are screwed together and were made specially for the tower.

Construction of the supporting structure from thin galvanised sheet steel. The spars of folded sheet metal are screwed together and were made specially for the tower.

Construction of the supporting structure from thin galvanised sheet steel. The spars of folded sheet metal are screwed together and were made specially for the tower.

Construction of the supporting structure from thin galvanised sheet steel. The spars of folded sheet metal are screwed together and were made specially for the tower.

Filling the gabion baskets with plastic waste from the beaches of Cape Town on the South Atlantic.

Filling the gabion baskets with plastic waste from the beaches of Cape Town on the South Atlantic.

Filling the gabion baskets with plastic waste from the beaches of Cape Town on the South Atlantic.

Filling the gabion baskets with plastic waste from the beaches of Cape Town on the South Atlantic.
©
2026
Markus Heinsdorff Copyright.
©
2026
Markus Heinsdorff Copyright.
©
2026
Markus Heinsdorff Copyright.
©
2026
Markus Heinsdorff Copyright.
