There is nothing at the posted coordinates but it is an ideal, on road, place to park near to the entrance of the cemetery.
This is the physical bonus cache you will be able to find on completing the Trowbridge Down Adventure Lab -
https://adventurelab.page.link/HcPz.
The nano size container is not within the boundary of the cemetery but very nearby.
Please note the opening times of the cemetery grounds
Oct to Mar 9am to 4pm and Apr to Sep 9am to 7pm.
The 5 stage adventure will take you on a short walk around the historic Victorian burial grounds that shouldn't take you any longer than 30 minutes, dependent upon how much you want to observe.
The cemetery, including the entrance lodge, the two splendid chapels, a number of impressive mausolea and numerous monuments, all Grade II listed is on the Register of Historic Parks and Gardens. In the late-C20 the cemetery was extended to the south and south west; this area lies outside the site here registered. We hope you enjoy the places we have chosen to take you to around the grounds. You will find many splendid monuments, graves and memorials so please do take your time and enjoy your visit.
You will obtain the final co ordinates and hint for this bonus cache in two of the Lab Adventure stages.