센닌다이 신호장, Signal station in Hakone, Japan.
Sennindai Signal Station is a staff halt on the Hakone Tozan Railway, located in the mountains of Kanagawa Prefecture. It serves as a control point to manage train movements on one of the steepest sections of any passenger railway in Japan.
The halt opened on June 1, 1919, when the Hakone Tozan Railway began operating through the mountains. It was part of an early effort to connect the region by rail across terrain that required special engineering.
The Hakone Tozan Railway is known for its hydrangea season, when flowers bloom close to the tracks and passengers can see them from their seats. The train moves slowly enough through this section that the plants pass just outside the window.
The halt is not open to the public and can only be seen briefly from a passing train. Visitors who want to experience the railway should take a regular service on the Hakone Tozan line and enjoy the ride through the mountains.
The railway uses a switchback system to climb the mountain, meaning the train reverses direction several times during the journey instead of following a single straight path. This technique is rare among passenger railways in Japan and makes the ride itself worth watching from the window.
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