- Who
- Atlantic Avenue Tunnel
- What
- first
- Where
- ()
- When
- 1844
The Atlantic Avenue Tunnel, Brooklyn, USA, was built over a period of seven months in 1844. Running for 767 m(2,517 ft), it is 6.4 m (21 ft) wide and 5.2 m (17 ft) high. The tunnel was the first in the world built underground in order to improve urban congestion, public safety and rail operations. It operated until 1861, when the ends were sealed off, and was rediscovered in 1981.
