Spiralen
A road tunnel that winds up six and a half times around an axis and is 1650 metres (5410 ft) long. Starts at 50 m a.s.l. ends at 213.
Monument
A road tunnel that winds up six and a half times around an axis and is 1650 metres (5410 ft) long. Starts at 50 m a.s.l. ends at 213.