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:

A warded garden. It is claimed by the red demon. It is associated with a mysterious golem.
The Chambers of the Prince is a beast pen. It is desecrated ground. It is associated with fiendish magic.
The Maze of the Insidious Smith is a Court. It is in a meadow. It is blessed by a power of darkness. It is protected by a poltergeist.
Several stone ruins appear to rest on nothing. A magical bridge of force supports them. Surrounding are fields of golden flowers.
A sinister mountain. It is at the top of a hill. It has a great ritual that happens monthly. is said that the Pillars of Magnificent Bronze is nearby..
The Shadowed Halls of Grimskull is a manor. It is associated with a power of chaos. It is disguised by a hallucinatory terrain.
A magnificent junction. It is a dead magic zone (similar to an antimagic field).
Lake of Legends. Several islands with ancient structures form a rough circle. At the center of the circle are wrecks of several boats. Locals say the lake tells secrets to those making sacrifices there.
Dreamfall Meet. Where two rivers meet is an overgrown old burial ground. At its center is a collapsed temple, linked to local prophecy.
Whismore Mill. In the ruins of a gnomish town stands an active mill. An arcane experiment, it stores energy in underground vaults.