Other than a circular skylight near the top and a couple of air holes, there are no windows.
The hotel was built by designer Andreas Strauss in 2004.
It was originally opened at Linz and later moved to the nearby Ottensheim.
Guests who wish to spend a night or two are required to book their rooms at thehotels website.
Upon acceptance of the booking, guests receive a code to unlock the door to their pipe.
The thick cement keeps the interior comfortable and eliminates noise from outside, creating a secure-feeling environment.
The concrete walls are cool on hot days and comfortably warn in winter.
A swimming pool is nearby.
The best aspect of this hotel is that it operates on the “pay as you wish” system.
Photo credits:Andreas Straussandfoam.
