Eismeer (Sea of Ice) station sits at 3,160 metres inside the Eiger, one of two intermediate stops on the Jungfrau railway between Eigergletscher and the Jungfraujoch. A window blasted through the rock opens directly onto the Ischmeer glacier, one of the upper tributaries of the Grindelwald glaciers — you look out through a hole in a sheer ice face onto a vast snowfield.
The stop lasts five minutes, which is enough to press your face to the cold glass and take in the eeriness of standing inside a mountain looking at a sea of ice from the inside out. Most passengers are too focused on getting to the top to linger, which makes it the least crowded viewpoint on the route. Included in the Jungfraujoch ticket price.