30inches
Approximate width of the worn center marker
The center itself is modest: a worn patch of concrete, a field of brick and a peculiar return of sound. The setting opens outward—to rail history, public art, music, Greenwood and the Tulsa Arts District.
Start with the practical guideSay something.
You do not see the trick first. You hear it. From the center marker, a clap or a few ordinary words return with a tight, metallic character that seems to belong to the circle alone.
- 1Stand in the center.
- 2Speak or clap.
- 3Listen for the return.
railroad tracks
A bridge first.
A mystery later.
Long before anyone called this the Center of the Universe, Boston Avenue crossed the tracks by car. A fire, a pedestrian rebuild and one remarkably lucky piece of geometry changed what happened next.

72.5 FT
The echo is only half the strangeness.
Robert Haozous's Artificial Cloud has stood beside the circle since 1991. Its rusting steel is not neglect dressed up as art; weathering is part of the work's ongoing idea.
Not a spire. Not a totem. Artificial Cloud.Meet the artwork
The Center is changing.
The echo is staying.
The attraction takes minutes.
The neighborhood can take the afternoon.
13rows
Concentric brick rings around the center72.5feet
Published height of Artificial Cloud1930sorigin
The first bridge carried cars over the tracksIt's on the bridge,
not at street level.
Approach from Boston Avenue or the Arts District side and look for the elevated pedestrian plaza above the railroad tracks.