Piano stairs - TheFunTheory.com - Rolighetsteorin.se
Why the open web links it
Demonstrates how turning stairs into a piano encourages people to walk instead of take the escalator.
Linked by 330 independent sites, 20 of them widely read in the 2026-10 crawl of the open web, including ucl.ac.uk, northwestern.edu, monash.edu, salon.com, uu.nl.