Nemeton

The Nemeton is a magical tree stump within the Teen Wolf Universe.

It is located within the Beacon Hills Preserve near where Scott McCall was first bitten by a werewolf in the episode Wolf Moon.

History
According to Chris Argent, a Nemeton is a sacred space used by druids for various rituals.

He says druids picked a large, older tree in a grove to represent the center of the world. Many believed that cutting or harming the "world tree" would bring severe problems like fires, plagues, strife, “death and destruction of all kinds” to surrounding villages. (Visionary)

Druid Emissary Alan Deaton explains that the power of the Nemeton is like a magnet that draws supernatural creatures to itself like a beacon. (Alpha Pact)

The Beacon Hills Nemeton remained dormant, powerless for many years until Derek Hale killed his high school girlfriend Paige among the tree's roots. This unintentional blood sacrifice powered the tree enough to allow Druid Emissary Julia Baccari to survive after being attacked and left for dead by Alpha Werewolf Kali. (The Overlooked)

The stump gained further power when Scott McCall, Stiles Stilinski, and Allison Argent performed a druid ritual to locate their parents. The three students sacrificial "deaths" fully charged the Nemeton and it is now broadcasting at full power to all the supernatural elements within the Teen Wolf Universe.

Real World Myth
The Nemeton in Teen Wolf is loosely based on the nemeta found in Celtic Religion.

In the real world, a nemeton is any sacred space, often a wooded grove.

The Roman Poet Lucan described a real nemeton located in the south of France in 61 AD -


 * no bird nested in the nemeton, nor did any animal lurk nearby; the leaves constantly shivered though no breeze stirred. Altars stood in its midst, and the images of the gods. Every tree was stained with sacrificial blood. the very earth groaned, dead yews revived; unconsumed trees were surrounded with flame, and huge serpents twined round the oaks. The people feared to approach the grove, and even the priest would not walk there at midday or midnight lest he should then meet its divine guardian.