Caves in Maastricht

Maastricht Underground Adventures

Maastricht’s subterranean landscape features an extensive network of man-made marl caves, historical fortifications, and ancient archaeological sites. The Sint-Pietersberg hill contains thousands of corridors carved out over centuries for stone extraction. These tunnels served as shelters during wartime and house unique charcoal drawings and inscriptions. The area also includes Iron Age settlements like Oppidum Caestert and early medieval motte-and-bailey structures, offering a glimpse into the region's defensive history from pre-Roman times to the modern era.

Maastricht Underground Adventures — Map

A

Caves Zonneberg

Several cave systems run under Maastricht - there is no light, and they are completely silent. The labyrinth has more than 20,000 corridors!

B

Hoogtenederzetting Plateau van Caestert

Prehistoric hilltop settlement and archaeological site situated on the Plateau van Caestert.

Kleon3 / CC BY-SA 4.0

C

Motte De Tombe

Early medieval motte-and-bailey fortification located on the Sint-Pietersberg.

D

Oppidum Caestert

Iron Age fortified settlement, or oppidum, located on the plateau along the Dutch-Belgian border.

E

Noord, put fort st. Pieter

Historical shaft or well connected to the Northern cave system near Fort Sint Pieter.

F

Grotten van Kanne

Extensive marl quarry system known for its large galleries, mushroom cultivation, and historical murals.

G

Grafkelder

Historical burial vault located within the limestone plateau area.

H

Cannerbergroeve

Limestone quarry on the Cannerberg hill, part of the region's extensive underground mining network.

I

Groeve Theunissen II

Small marl quarry located on the western slopes of the Jeker valley.

J

Voormalig munitiedepot ENCI

Repurposed section of the limestone mines formerly used as an ammunition depot for the ENCI factory.

K

Groeve Feij

Section of the Sint-Pietersberg marl mines historically used for stone extraction.

L

Observant Nrd, Zuidelijk stelsel

Southern tunnel system located beneath the artificial hill of D'n Observant.

M

Kasteelgroeve

Marl quarry situated near the medieval ruins of Lichtenberg Castle on the Sint-Pietersberg.

N

Anciene Brasserie

Underground limestone chamber formerly utilized as a brewery or storage cellar.

O

Noord, Grote Ingang 2x

Main entrance points to the Northern labyrinth of the Sint-Pietersberg cave system.

P

Apostelgroeve/ Louberggroeve

Marl quarries located on the western slope of the Cannerberg hill.

Q

Bosberg

Limestone quarry system located within the Cannerberg.

R

Kasteelgroeve

Marl quarry situated near the ruins of Lichtenberg Castle.

S

Riesenberg-groeve I

Limestone quarry located in the Savelsbos forest, east of the Meuse river.

T

Scharnderberg, achter de zusters

Historical limestone extraction site located in the Scharn district.

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