The Bruder-Klaus-Feldkapelle is a chapel built in Mechernich, Germany. The building is completely isolated and is designed for silence, prayer, and meditation. The structure is held up by steel poles. The inside of the building has one place to sit and an altar. Inside it almost looks like a building made from sod. This increases the isolation that Zumthor was aiming for.
This is a creepy setting. I understand the thought process for the isolation, but this seems extreme.