Tongyeong Undersea Tunnel

The Tongyeong Undersea Tunnel, completed in 1932, is Korea's first undersea tunnel and a beloved walking attraction. Stretching 483 meters, it connects the mainland to Mireuk Island, allowing visitors to stroll beneath the sea. The tunnel's arched concrete walls and dim lighting create a nostalgic atmosphere, with small alcoves and historical photos along the way. At low tide, you can glimpse the water through small windows. It's a distinctive blend of engineering history and coastal charm, offering a cool respite from summer heat and a unique perspective on Tongyeong's maritime landscape.

Don't miss

• Walk the entire 483-meter length and feel the slight slope as you descend and ascend
• Pause at the viewing windows to see seawater and marine life at low tide
• Read the historical plaques detailing the tunnel's construction and significance

Tickets & tours

Ways to visit Tongyeong Undersea Tunnel

Cheapest way inVisit to the Toledo Underground4.7★ · 72 travelers~2 hoursFree cancellationFrom$13 per personSee dates →Best full dayBest DMZ Tour Korea from Seoul (Suspension Bridge & JSA Museum)4.9★ · 47,506 travelers7–9 hoursFree cancellationFrom$50 per personSee dates →Private & flexiblePrivate Cu Chi Tunnels Tour: Explore Underground War History5★ · 924 travelers6–7 hoursFree cancellationFrom$79 per personSee dates →