From the outside, this café in Hanoi, Vietnam looks fairly traditional with a tile façade that resembles fish scales and a heavy wood door. But inside hides a thriving garden centered around a koi pond. Farming Architects designed the space as a small, self-contained ecosystem with an indoor waterfall and an aquaponic vegetable garden.

Koi Café, aquarium, Hanoi, Farming Architects, aquaponics, ecosystem, Vietnam, green interior, waterfall, sustainable food

The café is nestled in an existing three-story building in Hanoi to which the architects added a steel frame. Its ground floor houses the fish pond filled with colorful koi carp, known as the Japanese national fish. The seating area next to it provides direct views of the water. Customers can also walk around the pond along a stepping stone walkway.

Koi Café, aquarium, Hanoi, Farming Architects, aquaponics, ecosystem, Vietnam, green interior, waterfall, sustainable food

Related: Bangkok Residents Turn Abandoned Mall into a Giant Fish Pond

The architects included an indoor waterfall flowing down into the pond as a reference to an old Chinese legend according to which if a carp could leap over a waterfall on the Yellow River, called the Dragon Gate, it would be transformed into a dragon and fly away. It also helps oxygenate the water for the fish.

Koi Café, aquarium, Hanoi, Farming Architects, aquaponics, ecosystem, Vietnam, green interior, waterfall, sustainable food

The rooftop garden and the pond function as a single ecosystem. Excrements produced by the koi carp are used to create nutrients for the plants growing in the garden on the third floor. Produce grown here is used in preparing the dishes served in the café and helps purify the water that flows back into the aquarium.

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Via Dezeen

Photos by Nguyen Thai Thach

Koi Café, aquarium, Hanoi, Farming Architects, aquaponics, ecosystem, Vietnam, green interior, waterfall, sustainable food

Koi Café, aquarium, Hanoi, Farming Architects, aquaponics, ecosystem, Vietnam, green interior, waterfall, sustainable food

Koi Café, aquarium, Hanoi, Farming Architects, aquaponics, ecosystem, Vietnam, green interior, waterfall, sustainable food

Koi Café, aquarium, Hanoi, Farming Architects, aquaponics, ecosystem, Vietnam, green interior, waterfall, sustainable food