Summary: The Swiss are infatuated with their tunnels and underground shelters - and have more of them than any other country in the world. Monocle's David Michon and photographer Beat Schweizer explored their hidden appeal.
Summary: The Swiss are infatuated with their tunnels and underground shelters - and have more of them than any other country in the world. Monocle's David Michon and photographer Beat Schweizer explored their hidden appeal.