NBM Dive Site Resource
Rummu Quarry
Rummu, Harju County, Estonia
Rummu Quarry in northern Estonia is a flooded limestone quarry beside a former prison complex, known for submerged buildings, walls and a sunken forest. Divers can explore open-water routes around the ruins, with additional quarry attractions reached through local operators.
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Quarry Picture Placeholder
Aquatic life at this dive site
What divers may encounter
Three reviewed connections are featured here. Sightings vary by season, conditions, and chance, so they are never guaranteed.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Site media
Photographs
Three views rotate from the published gallery on each visit.
Contributor media
Dive videos
Three featured video positions are reserved on every profile.Published reference location
Location map
The marker shows the public coordinates associated with this profile. Confirm current access, moorings, and departure details before the dive.Map data © OpenStreetMap contributors
Recent field observations
Diver-reported temperatures
Automatically checked observations from dives during the past 14 days. Three reports are visible at a time; scroll for more.A report that passes the automatic checks will appear here with the dive date, diver’s display name, and temperatures at each depth.
Reports are automatically checked for plausible dates, depths, and temperatures. They are observations, not forecasts; confirm conditions before diving.
Why divers know this place
Highlights
Submerged quarry/prison-complex ruins and walls; sunken forest; Pump House and Shelters/Barracks reached on operator-arranged raft trips; submerged excavator reported at 8–9 m (26–30 ft). The former prison museum is a separate land-based attraction.
Quarry-only module
Quarry layout and services
This section appears only for quarries and mines, with the practical details divers need for entries, training areas, submerged features, surface support, and current operations.
Before you arrive
Access notes
Reserve ahead with Rummu Diving & WaterSports: +372 5699 3573; info@rummudiving.ee. Certified divers may arrange buddy dives during operator opening hours, subject to group bookings. Confirm current entry arrangements and fees: the operator's diving and 2026 price-list pages disagree about quarry admission inclusions.
Plan within your training
Conditions and hazards
Submerged structures and trees create obstacles; entering buildings introduces an overhead environment. Plan routes and thermal protection with the local operator. Ice diving requires specialized training and arrangements. These are planning cautions inferred from documented site features, not an on-site safety inspection.
At the site
Facilities and support
Rummu Diving advertises equipment rental, tanks and weights, guided and introductory dives, training, parking, changing rooms and sauna on selected dive days. Some rental packages exclude a dive computer. Dining and accommodation are available within the quarry complex; confirm seasonal availability.
Independent resource notice
This record is a starting point for independent verification. Access, closures, moorings, weather, currents, depth, visibility, operator availability, and site conditions can change without notice. Confirm current information with the responsible operator, property owner, managing authority, or another qualified local source before planning or attempting a dive.