I just did a very significant update to the Atlantic Avenue Subway Tunnel article. Added a lot of photographs and writing about the history of the tunnel and how it was discovered by a 20 year old engineering student in the 1980s after being hidden for over 100 years. It's an incredible story.
Bob Diamond discovering the Atlantic Avenue Tunnel entrance in 1980.
There are fairly frequent tours of the tunnel, which you enter through a small manhole in the middle of Atlantic Avenue, and it's by far the most interesting tour that I've ever taken.
The next tour is on May 16th. Get tickets before they sell out:
http://www.brooklynrail.net/bhra_events.html
*If you like the photos in this post please help me spread the word by sharing. Thanks.