I live in Holmdel and I've spelunked Bell Labs many times since it's closed, but not the main building as seen in these pictures. The satellite buildings to the south are in disrepair but are very interesting. The semi-anechoic chamber was among the best preserved, located in a small shed on top of a hill. I gained access by gently kicking in a small window near the main door. Everything important had been stripped out but the essentials remained- the turntable was still intact along with the stairs down to the control room. A visitor log book found here contained several records, including emerging cell phones and even the sega genesis. I moved onto the office next which was where I found most of my treasure. Mugs, books, branded memorabilia, etc. was poured all over the floor- it gave me the impression the facility was abandoned rather quickly. On my wall is my favorite piece, a large blueprint of "buildings within 1000 ft of the EMI facility" which was located nearby.

The second most interesting building was the "Oceanic wave test facility". Its a fairly mundane building along the perimeter of the property, located between an emergency power plant and the strong waste holding tanks. On one of my first visits here the room was filled with equipment- open books on desks facing a mainframe computer filled the room. I couldn't get in because I was worried about tripping an alarm or alerting the patrolling security guard so I left. On my next visit all of the equipment was gone.

There are a few other buildings and interesting artifacts (including a replica horn radio made of solid metal), but since it was acquired security has tightened up a bit. I took a ton of pictures, maybe one day I'll post em.