D&D Notable Location - Ruins

A location that is known locally or further afield, as a landmark, place of history, magical danger or otherwise noteworthy.
Ruins might be a haunted mansion, an abandoned village or a crumbling tomb, among broken masonry, fallen pillars and piles of debris. They are home to restless spirits, strange oozes, desperate cultists and arcane experiments.

tools for - dnd5e location quest ruins

terrain:

An odd ruins. It is associated with a mysterious shambling mound. was where a planar portal was built.
A glittering stone arch.
A hidden ruins. It is at a river crossing. It is touched by arcane magic. was where a fey portal was built.
A decorated wood. It is associated with witches. was for a ritual by a fun-loving knight a decade ago.
The Elder's Glen is an overgrown canal. It is at the top of a hill. It is in the area of a forbiddance spell. It has a magnificent view.
Ruins of Eiravel's Vale is a sunken ruins. It is in a meadow.
Ruins of Cartower is a bridge. It is at the top of a hill.
A foreboding asylum. It is at a crossroads. It is in the area of a hallow spell.
A dwarven Maze. It is in a meadow. It is associated with a ruthless warlord.
A hidden ravine. It is at the edge of a lake. It is associated with water magic. was the site of a renowned battle - a confederation of tribes lost to a group of city states and undead roam here.