The caves are home to several species of hibernating bats, making the site an important ecological sanctuary during winter months.
The sand in the tunnels is uniquely white and fine, a result of the specific geological composition of the Kurzeme region.
The labyrinth includes a 'wishing room' where visitors traditionally leave a small token or stone.
The cave network was originally created by manual excavation, primarily for industrial sand extraction during the 18th and 19th centuries.
The interior is significantly cooler than the external environment, requiring visitors to adjust for a sharp temperature drop.
The sandstone walls are considered soft and are susceptible to damage from human touch, which is strictly prohibited.
The Riezupe Sand Caves are an extensive man-made labyrinth of sandstone tunnels located on the banks of the Riezupe River near Kuldīga, Latvia. These caves feature approximately 360 meters of accessible subterranean passages out of a total network that once spanned significantly further. The environment maintains a constant year-round temperature of approximately 8 degrees Celsius. The tunnels were excavated over several centuries for the purpose of mining sand, which was historically used for glassmaking. Guided tours are mandatory for entry, as the sandstone structure is delicate and prone to collapse. The site is a protected geological monument due to its unique sand formations. The surrounding landscape consists of a river valley characterized by natural forested ravines.
The entrance area where natural light contrasts with the dark, textured sandstone walls.
Wear warm clothing, including a jacket or sweater, regardless of how hot it is outside.
Wear sturdy, closed-toe walking shoes with a good grip, as the cave floor is uneven and sandy.
Plan your visit well in advance, as guided group sizes are restricted to maintain safety and cave integrity.
Do not attempt to explore the caves without an authorized guide, as the tunnels are unstable and unlit.
Operates primarily from spring through autumn; remains closed during winter to protect hibernating bat colonies.
Touching the cave walls is strictly prohibited to prevent structural erosion; follow the guide at all times; silence is requested to respect the bat colonies.
