Michigan, Indiana, & Ohio junction. You can drive to this one. There is a marker with directions to the tristate corner. Easy to find, worth a look if you are in the area.
There is no container, just three markers and a chance to use your GPS for those of you who enjoy just bagging cache sites.
(9-15-06) UPDATE: To log your find, upload a photo of one of the markers, with your GPSr shown. Or...email me & tell me in which state the nearest home is located.
The actual tristate junction is at the plate in the roadway.
You may also want to check out Benchmark MD1841
DESCRIBED BY COAST AND GEODETIC SURVEY 1932
10-INCH SQUARE GRANITE POST PROJECTING 20 INCHES, AND MARKED-
TOP, NO. 1,
AND WEST, IND. LINE 20 FEET
Edit: 08-26-11 In the fall of 2010, the cover plate in the roadway went MIA. The plaque is still there though.