Berlin Tempelhof Airport. TSGT Jose Lopez Jr., US Air Force/Wikimedia Commons Berlin is a city full of abandoned buildings with long and troublesome histories. But one building has been through more turmoil than most: Tempelhof Airport.

The colossal airport straddles Neukölln and Tempelhof — neighbourhoods approximately 4 kilometers, or 2.5 miles, south of the city's centre.

The airport's main building was once one of the largest structures in Europe, and it was crowned "the mother of all airports" by British architect Norman Foster.

Tempelhof has been used to test some of the world's first aircraft, house World War II prisoners, and give the people of West Berlin a vital lifeline to the outside world during the Cold War. It's also been used to film movies such as "The Hunger Games," "The Bourne Supremacy," and "Bridge of Spies," as well as for the occasional illegal rave.

Despite efforts from about 500 protesters and a majority voting in a referendum to keep it open, the airport officially closed on October 30, 2008.

Today, the airport is being used as a massive refugee camp with space for up to 7,000 migrants.

We went on a tour of the airport led by a guide named Celine Gilly: