Letters Square Roundabout, Manaus, Brazil

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.