This Winter Blues

O winter! bar thine adamantine doors:
The north is thine; there hast thou built thy dark
Deep-founded habitation. Shake not thy roofs
Nor bend thy pillars with thine iron car.

He hears me not, but o’er the yawning deep
Rides heavy; his storms are unchain’d, sheathed
In ribbed steel; I dare not lift mine eyes;
For he hath rear’d his sceptre o’er the world.

Lo! now the direful monster, whose skin clings
To his strong bones, strides o’er the groaning rocks:
He withers all in silence, and in his hand
Unclothes the earth, and freezes up frail life.

He takes his seat upon the cliffs, the mariner
Cries in vain. Poor little wretch! that deal’st
With storms, till heaven smiles, and the monster
Is driven yelling to his caves beneath Mount Hecla.

- William Blake, "To Winter" (1783)
In the 16th century Caspar Peucer wrote that the Gates of Hell could be found in "the bottomless abyss of Hekla Fell". The belief that Hekla was the gate to Hell persisted until the 1800s.