Come and enjoy the unique isolation of being so close and yet so far away from anyone in the suburbs. Don’t forget to bring a coin to ensure the boatman fairies your soul to the other side safely.
This is best attempted by kayak or very small boat at high tide so the current is not too strong. It is a nice leisurely paddle from the listed waypoint but you must find your way round the guarding mangroves at the entrance then under the motorway bridge.
The Entrance of the Underworld (River Styx) is where the dead enter. Before the entrance to Hades live Grief and Anxiety, along with Diseases and Old Age. Also Fear, Hunger, Death, Agony, and Sleep, dwell in this place together with Guilty Joys. On an opposite threshold is War, the Erinyes, and Eris. Close to the doors, many other beasts dwell consisting of Centaurs, Gorgons, the Lernaean Hydra, the Chimera, the Harpies, and others. In the midst of all this, an Elm can be seen where False Dreams cling under every leaf.
The souls that enter the Underworld carry a coin under their tongue to pay Charon to take them across the river. Charon may make exceptions or allowances for those visitors carrying a certain Golden Bough. Otherwise, this Charon is appallingly filthy with eyes like jets of fire, a bush of unkempt beard upon his chin, and a dirty cloak hanging from his shoulders. Although Charon embarks now one group now another, some souls he keeps at distance. These are the unburied where they can't be taken across from bank to bank if he had not received burial.
Thanks Wikipedia
You are looking for a large jar attached by a carabineer to a mangrove at the listed coordinates.
Tide Link: HERE
Well done to martz_10 and emm-jay for braving the weather and getting the FTF.