El Hierro
In short
El Hierro is the smallest and westernmost of the inhabited Canary Islands, located in the Atlantic Ocean.
In plain words
It is a small island part of Spain. It is famous for being the place where the prime meridian was once measured. The capital town is Valverde.
A simple example
If you travel to the furthest western point of the Canary Islands, you will arrive at El Hierro.
Why it matters
It is a key part of the Canary Islands archipelago and has a unique geographical position. It is also known for its efforts in using renewable energy.
Easy to mix up
Do not confuse it with La Graciosa, which is the smallest inhabited island in the Canaries.