Mount Teide

Mount Teide is an active Volcano on the island of Tenerife in the Canary Islands.

Mount Teide reaches a height of 12,198 feet (3,718 m), and its peak is often covered in snow.
It is the highest Island in the Atlantic, and a navigation mark to shipping. The other Canary Islands can all be seen from the top of Mount Teide.
Mount Teide casts the world’s largest shadow over the sea, at dawn and dusk, stretching for 25 miles (40km) in the shape of a perfect triangle.

Mount Teide and its surrounding area is part of the Teide National Park, a UNESCO World Heritage Sites, located on the island of Tenerife.
Tenerife is part of the Spanish Canary Islands, which makes Mount Teide the highest mountain in Spain.
The last eruption on Mount Teide was in 1909 CE, from a side vent.
The Black lava that covers the sides of the volcano are from a summit eruption in c. 850 CE.

In Ptolemy's Geographia (c.150 CE), the Roman Prime Meridian or Zero Degrees Longitude was located in the Canary Islands and centred on Mount Teide in Tenerife.
The Netherlands used Mount Teide as the Prime Meridian from the 1640’s until 1826.
However, El Hierro is the furthest island west of the Canary Islands and of the ‘Old World’ before the discovery of America in 1492. El Hierro was used as the Prime Meridian for over 500 years by various European nations, including France from 1634.

Mt. Teide, Tenerife