License photographs from damirissimo

Deep forested valley viewed from a grassy mountain slope

Narrow concrete road descending through open green hills

Natural stone arches and green floor inside Devetashka Cave

Visitor path crossing the green, daylight-filled front of Devetashka Cave

Vegetation growing beneath a tall opening in Devetashka Cave

Warm light falling across rocks on the cave floor

Round tunnel opening toward a railing in the darkness

Bright green vegetation framed by a dark cave arch

Tall Devetashka arches above a stream and green cave floor

Blue sky and clouds visible through a cave skylight

Sculpted limestone reflected in a still cave pool

Green mountain peak seen beyond rocky slopes

Close view of bright green moss on the forest floor

Silhouetted visitor standing in a dark chamber of Ledenika Cave

Visitor climbing illuminated steps through a dark cave hall

Narrow limestone passage lit with warm amber light

Steep staircase disappearing into a dark cave passage

Illuminated cave formations surrounding a metal staircase

Tall stalactites and a staircase in a black-and-white cave chamber

Straight forest road seen through a vehicle windscreen

Four-wheel-drive vehicle approaching a broad puddle on a dirt road

Four-wheel-drive vehicle throwing up water as it enters the puddle

Front view of the vehicle emerging through a wall of spray

Four-wheel-drive vehicle cutting through the puddle at speed

Water spraying around the vehicle on the muddy track

Vehicle driving out of the puddle between grassy verges

Close view of the vehicle surrounded by suspended water droplets

Yellow railway service vehicle at Koprivshtitsa station

Cracked window in the yellow railway service vehicle

River and wooded hillside seen through foreground leaves

Car dashboard glowing green during a rainy twilight drive

Bulgarian mountain village beneath a blue, cloud-heavy evening sky