D&D Notable Location - Swamp

A location that is known locally or further afield, as a landmark, place of history, magical danger or otherwise noteworthy.
The mists of the swamp hide many things, from the ruins of civilisations to shifting currents. Frogs and reptiles of all kind are found here, living alongside lizardfolk and snake-like abominations.

tools for - dnd5e location quest swamp

terrain:

Large leeches stick to an invisible bridge over a brackish lake. Magic items glow near the bridge. A hamlet of hermits is sat at the shore.
The Demented Haven is an overgrown wood. It is associated with hippos. is where an undead was imprisoned.
A pretty ruins.
A cursed glade. It is in a meadow. It has a crossing to another part of the world. was the site of a renowned battle - a cabal of wizards defeated gnomes and ghosts haunt the place.
A reflective ruins. It is used as a temple by a power of dusk.
Mule Rock is a hot springs. has been moved from another plane.
Everway Pass is a sinkhole. It is touched by fey magic. has the tomb of a foolish prophet.
Wyrmlife Falls. Waters flow down an obsidian cliff, changing color along the way. There is a verdant mass of plants at the bottom. Pictures of a dragon are carved into the cliff.
A sentient Barrow. It is in a meadow. It has a programmed illusion involving an adventuring scene. was where an elemental portal was built.
The Lodge of Terror is a Pyramid. It is at a river crossing. is where a god was imprisoned.