The Long Gallery — Fort Valledrane
A vaulted stone corridor recedes into shadow inside Fort Valledrane, an early-1900s Italian fortification above Lake Idro — arch after arch marching off into the dark, lit by whatever daylight makes it through. It's moody, architectural, almost cinematic, and it gives our cut algorithm a rare vertical rhythm to play with: repeating stone arches that beg for a touch of tessellation in the piece pattern, deep shadow that hides whimsies until you're right up on them. Pieces along the corridor's centerline run long and confident; pieces in the stonework tighten into smaller, more deliberate shapes. The hardest pieces lurk in the darker archways, exactly where you'd expect a fortress to keep its secrets. This is a puzzle that rewards patience — the kind of low-light, high-atmosphere image that looks even better assembled than it does on a screen.
Photo: Superbass, CC BY-SA 4.0, via Wikimedia Commons.
Difficulty: Moderate
Artwork: Photo: Superbass, CC BY-SA 4.0, via Wikimedia Commons