I have always been fascinated with mechanical things. Moving parts; engines, motors, turbines, actuators, et cetera are all designed with function over form in mind. Still, there is a certain beauty to a well-designed machine or piece of equipment. Somebody had to design the equipment to fill a basic need. In that design process, a certain amount of creativity was used to determine how it looks. The title specifies machinery, however by extension, transmitters are included in this category.
Here are some pictures of various equipment and things found in a radio station:

Onan diesel generator, WROW-AM transmitter site, Albany, NY.

Overhead Conduit, WRKI transmitter site, Brookfield, CT

Playing around with Photoshop. The back of a Nautel V 7.5 transmitter, WSPK transmitter site, Mount Beacon, NY.

Sixty-foot tall Aeromotors LS40 fire tower, Clove Mountain, NY

Back of Nautel NV-40 transmitter, WVPS, Mount Mansfield, VT

LEA TVSS surge suppressor, WSPK, Mount Beacon, NY

RCA BTA1AR transmitter

Nautel V-40 transmitter (combined V-10 x 4), WHUD, Peekskill, NY

WHHZ studio console, Gainesville, FL