American graphic designer and artist Andrew Herzog has created a 1,000-metre "walking mural" around the National Museum of Art in Bucharest, Romania.
As part of Unfinished Festival, Herzog walked in a ring around the museum, while spraying the ground with a biodegradable white paint that he mixed himself.

The work, titled Circle or Curve" is intended to raise questions about the relationship between the artist and the viewer. Herzog sees it as "an exploration of the viewer's and artist's shared responsibilities and roles in an artwork."
Neither Herzog himself, nor those looking at the work, can see the entire piece from their vantage point at ground level. They must rely on their imagination to complete the rest of the artwork in their own head.
"The artist walks and draws by assessing the previous, current and future path, visualising the circle in curves before viewing it whole, photographed from above," explained Herzog.
"The artist and the viewer must enact the same process in trying to imagine where they are in the circle, how far they've travelled, and whether it even is a circle," he continued.
"Just as the artist envisioned the work partially while creating it, the viewer must also assume the responsibility of seeing the circle in parts while walking it. Comprehension of the work relies on continual assessment of the path as they walk the drawing."

His work gives viewers the tools to participate in the creat...