I discovered the hidden history of Tallinn's subdistrict of Astangu with a lantern hike through old Soviet military tunnels. Exploring the area once used as a military base during World War I and witnessing the remnants of abandoned U-shaped ammunition storage tunnels hand-carved from the limestone cliffs. Led by a knowledgeable guide, traversing slippery slopes, and unstable terrain for two hours with a helpful headtorch to navigate the rocky sections. This affordable and unique experience costs €20 per person and provides a fascinating insight into a district rich in intrigue and adventure!