# Lummelunda Cave

- **Country:** Sweden
- **Coordinates:** 57.738000, 18.405000
- **Access:** Daily tours May–September
- **Length:** 4.5 km
- **Website:** [http://www.lummelundagrottan.se/ lummelundagrottan.se]
- **Location:** Lummelunda, Gotland, Sweden
- **Register:** Sveriges Speleologförbund – SSF
- **Visitors:** 110,000
- **Map Image:** Lummelundsgrottan map.jpg
- **Map Width:** 250px
- **Free Data 1:** 2364
- **Photo Width:** 300px
- **Free Label 1:** Land registry number
- **Photo Caption:** Original entrance of the Lummelunda Cave

The Lummelunda Cave (, also known as the Rövarkulan, "The Robbers' Den") is located in a nature reserve at Lummelunda north of Visby on Gotland, Sweden. The explored part of this karst cave is almost , making it one of the longest caves in Sweden. It is created by the drainage water from the Martebo mire. The water forms a stream with its outlet in the Baltic Sea. In the 15th to 19th centuries, mills and an ironwork were set up by the stream.

![Photo of Lummelunda Cave](https://upload.wikimedia.org/wikipedia/commons/9/9b/Lummelundagrottans_mynning_inifran.jpg)

**Source:** https://en.wikipedia.org/wiki/Lummelunda_Cave (Wikipedia, CC BY-SA)