There are artworks you look at, and there are artworks you walk through. Jesús Rafael Soto understood the difference better than almost anyone. The Venezuelan kinetic artist spent his career dismantling the passive relationship between viewer and object, and nowhere is that ambition more fully realized than in his ‘Pénétrable’ series — sculptures built not to be observed, but to be entered. ‘Pénétrable BBL Jaune’, originally conceived in 1999, remains the purest expression of that idea.
The work is deceptively simple in form. A white steel frame suspends thousands of yellow PVC tubes — around 4,000 in total — that hang in a dense, luminous field. At a distance, it reads almost like a monolithic block of color, a solid presence that the eye cannot immediately parse. Move closer, and the illusion shifts. Step inside, and it dissolves entirely. The tubes brush against your arms, your shoulders, your face. The sculpture is no longer in front of you — you are inside it, and it is responding to you. That exchange, that collapse of separation between the work and the person experiencing it, was Soto’s lifelong obsession.
Designer: Jesús Rafael Soto
Soto was born in Ciudad Bolívar, Venezuela, in 1923, and spent much of his career in Paris, where he became central to the kinetic and Op Art movements of the 1950s and 60s. He died in 2005, but his estate relaunched ‘Pénétrable BBL Jaune’ in 2023 to mark the centenary of his birth, ensuring the work would find new audiences in new contexts. In 2026, that context became London. The Serpentine Galleries installed the piece outside Serpentine South as part of their summer art programme — the first work by Soto ever shown outdoors in the UK.
Serpentine artistic director Hans Ulrich Obrist, who helped select the work, described Soto’s ‘Pénétrable’ as a genuine invention — a shift from object to relation. “It goes from an object to a relation,” Obrist noted, “and we felt that would be amazing as part of our public art projects.” That framing feels precise. The yellow tubes are not decorative. They are a mechanism for recalibrating how a body moves through space, how a crowd becomes a participant, how color becomes atmosphere rather than surface.
What makes ‘Pénétrable BBL Jaune’ endure is its refusal to age into mere spectacle. In a cultural moment saturated with immersive experiences engineered for the camera, Soto’s work asks something different — not that you photograph it, but that you feel it. The tubes sway. The light shifts. The boundary between you and the artwork, for a moment, disappears entirely.
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