Tennaqua is just east of I-94 Tollway and just south of Deerfield Road.

From the east:

Take Deerfield Road to Castlewood (first light west of Wilmot Road).

Turn left (south) on Castlewood and then take an immediate right towards Seimens (corporate building).

Follow road around to left past Dade Behring. Road ends at Tennaqua parking lot.

From 94/294 Northbound:

Exit Deerfield Road East. Turn right (south) at first light (Castlewood).

Then take an immediate right towards Seimens (corporate building).

Follow road around to left past Seimens. Road ends at Tennaqua parking lot.