Dark-sky places in Bulgaria
Of 3 dark-sky places and national parks in Bulgaria, Rila National Park has the most clear, moonless hours of full darkness: 538 a year (ERA5, 2006–2025). The darkest sky is at Pirin National Park, darker than 71% of Europe’s land (NASA VIIRS 2025).
| Place | Best month | Clear moonless dark hours a year | Darker than… |
|---|---|---|---|
| Rila National Park national park | August | 538 | 69% |
| Pirin National Park national park | August | 536 | 71% |
| Central Balkan National Park national park | August | 501 | 69% |
Climate, not a forecast: these are shares of past nights (ERA5 reanalysis, 2006–2025), not a prediction for a particular night. Check a forecast before you go.