Atocha Station in Madrid, Spain. It has a huge jungle inside. (Pete Carr)

Atocha Station in Madrid, Spain. It has a huge jungle inside. (Pete Carr)

Atocha Station in Madrid, Spain. It has a huge jungle inside. (Pete Carr)

Atocha Station in Madrid, Spain. It has a huge jungle inside. (Pete Carr)

Atocha Station in Madrid, Spain. It has a huge jungle inside. (Pete Carr)

Atocha Station in Madrid, Spain. It has a huge jungle inside. (Pete Carr)