This mountaintop observatory is home to one of the world's largest reflective telescopes.

A rocky face gazes out over an enormous volcanic crater.

These wooden balconies that are both decorative and functional.

The largest salt farm in the Canary Islands is located at the foot of an active volcano.

This underwater graveyard commemorates a group of murdered 16th-century missionaries.

A pre-Hispanic pyramid in the middle of a tourist district in the Canary Islands.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.

Hundreds of caves once used to store grains and animal feed.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

This local emblem is the oldest and largest dragon tree in the Canary Islands.