You are looking for a medium-sized wooden chest in a concealed location. The cache is not far from the car park at the very end of the road on Two Tree Island. You will have to traverse uneven ground to reach the cache so watch your step.
There may be many treasures within but please try to take only one object and leave something of equal or greater value so another treasure-seeker will strike gold!
This cache was placed with the permission of Essex Wildlife Trust and contains details about the Trust and the local area. The land this cache is placed within is a site of special interest and protection as the Salt-marsh is a unique ecosystem, with great importance as a breeding and nursing area for many species. Where the fresh water flowing from the Thames Estuary meets the salt (saline) water from the sea, the varying levels of salt in the water provides a wide assortment of habitats.
Salt-marshes are semi-sheltered and are primary breeding grounds for many water and wading birds as well as nursery areas for many fish species. With so much teeming life, they also act as feeding grounds for the larger waders and waterfowl.
For more information, please visit:
http://www.wildlifetrusts.org/reserves-wildlife/great-places-see/saltmarshes-and-estuaries
Salt-marshes are now fairly rare habitats in the United Kingdom so please take care as you traverse the cache site and be mindful when poking around in the grass and placing hands in crevices. Some of the wildlife may be nesting and certain animals, such as adders, do pose a risk to those that disturb them.