Conor MacNeill documents Stockholm Metro, the world's longest underground art gallery

Fascinated by this , London photographer Conor MacNeill decided to document many of them, capturing the explosion of creativity underneath the Scandinavian city. "Many of the stations are left with the bedrock exposed and painted," Conor explains. "It gives a surreal look to many of the platforms and escalators. Each decorated station has it's own unique look and feel."

Some of these incredible prints are available to purchase online. You can discover the whole series via Behance. You should also follow Conor on Instagram for further travel and landscape photography.

All images courtesy of Conor MacNeill