Home to several
nuclear reactors, both
fusion and
fission. If you walk down
Mass Ave in
Cambridge, you'll see the
fission reactor on the corner of
Albany Street, opposite
the Paradise, a
seedy gay bar. The big green dome is the reactor containment vessel, and the small adjacent structure is the cooling tower. Look out for the mist that drifts out of it...
If you walk south down albany street, you'll pass the Plasma Fusion Center (PFC) on the right (under the pedestrian bridge that spans the street), and in two inconspicuous on the left, you'll find two fusion reactors. The PFC was also home to some important plasma rocket research.
The irony is that Cambridge, affectionately nicknamed the People's Republic of Cambridge, has declared itself a nuclear-free zone.