Amid the fast-paced traffic of Manaus, in Amazonas, Brazil, there's a point where meaning dissolves. Seen from above, the image appears to show a roundabout like any other. But in its centre rests an unusual sculpture: gigantic steel letters intertwined in a knot. Created by artist Sérgio Cardoso in 2003, the work arrived before the roundabout itself—traffic circled around it before any road planning. Made of stainless steel and about 4 metres tall, its original name, 'Diálogo,' never stuck. For residents, it was always 'Bola das Letras.' And so, it remained: a spontaneous nickname, a reference that slipped out of control and became part of the urban landscape. Today, few remember the official title—or even the name of the roundabout.

Without a plaque, without a caption, the sculpture remains enigmatic. It doesn't form sentences. It doesn't point in a direction. Yet it has become a visual landmark and a living metaphor: a tangle of symbols in the heart of the city, challenging those who seek meaning where there is only suggestion.