The bunker B-S 4 Lány is a remnant of the Bratislava section of the Czechoslovak border fortifications from 1935-1938; currently there is a museum here.

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The Yawning Kea

November 13, 2020

Cycling

A fascinating sight just off the cycle route into Bratislava. The buildings and other related infrastructure were used in WWII and in the Cold War and have been renovated recently so are now open to the public. There is an information board on the cycleway for those that don't have time to call in.

Elibet

July 15, 2025

Cycling

These fortifications are not for everyone, historically yes, but also daunting.

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Routes here

Best routes to Bunker B-S 4 Lány (Seil)

4.6

(649)

4,028

riders

1. Dechantlacke – Bratislava Castle loop from Hardeggasse

128km

07:20

300m

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Hard

4.1

(110)

1,103

riders

2. View of Hainburg Castle – Danube Bridge Near Bratislava loop from Tôňava

28.2km

01:37

110m

Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.

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Easy

4.4

(11)

188

riders

3. UFO Observation Tower – Bratislava Castle loop from Rusovce

54.5km

03:13

140m

Hard bike ride. Good fitness required. You may need to push your bike for some segments of this route.

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Hard

Details

Informations

Elevation 140 m

Weather

Wednesday 4 February

8°C

3°C

37 %

Additional weather tips

Max wind speed: 12.0 km/h

Most visited during

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Location: Bratislava, Slovakia

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Bunker B-S 4 Lány (Seil)

1. Dechantlacke – Bratislava Castle loop from Hardeggasse

2. View of Hainburg Castle – Danube Bridge Near Bratislava loop from Tôňava

3. UFO Observation Tower – Bratislava Castle loop from Rusovce

Other Popular Places to Check Out

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