Turning Stockholm’s metro art into a collectible scavenger hunt

Concept app made for Claude Build Day

Stockholm’s metro is often called the world’s longest art gallery94 of its 100 stations have art. Most of the time you’re walking past it on the way somewhere.

Explore the stations and add pieces of them to your collection

Small details make a collection worth completing

Weight“My pocket is getting heavy”

2 / 9

The gap“That empty slot bugs me”
The back of a T-Centralen coin, engraved T-CENTRALEN, 25 SEPTEMBER 2026, No. 001 / 94
Provenance“This one is mine”

Explore the collection of 52 coins (so far)

Blue line

T-Centralen

Blue vines and silhouettes of the workers who built the station, painted across a white cave.

Per Olof Ultvedt · 1975

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