Getty Images photographers Dan Kitwood and Win McNamee are documenting refugees' journey as they flee war in Syria and head towards safety in the European Union. Our previous gallery covered the first part of the trip: by boat from Turkey to Kos, followed by a ferry trip to Athens.

In this gallery, we catch up with the migrants and refugees in northern Greece, about to cross over into Macedonia. Up to 4,000 people make the crossing from Greece into Macedonia every day. The travellers make their way to a provisional camp near the border town of Gevgelija for some rest before resuming their journey. Inside the camp migrants are registered and given permission to be on Macedonian soil for 72 hours with free passage.

Syria refugees journey through Europe
Hundreds of families walk the final few kilometres through fields from Idomeni in Greece towards the Macedonian border to have their papers processedDan Kitwood/Getty Images
Syria refugees journey through Europe
A young Syrian woman waits to cross the border with her family after waiting for 20 hours in Idomeni, GreeceDan Kitwood/Getty Images
Syria refugees journey through Europe
People walk the final few kilometres from Idomeni in Greece towards the Macedonian borderDan Kitwood/Getty Images
Syria refugees journey through Europe
A young Syrian boy with cerebral palsy is carried by his brother after his family crossed the Macedonian border from GreeceWin McNamee/Getty Images
Syria refugees journey through Europe
A young Syrian man uses his teeth to harvest sunflower seeds from a field in Greece, near the Macedonian borderWin McNamee/Getty Images
Syria refugees journey through Europe
A young Syrian boy cries as his father carries him up a steep hill during their walk towards the Macedonian borderWin McNamee/Getty Images
Syria refugees journey through Europe
People scramble down a steep hill as they head towards the Macedonian border to have their papers processedDan Kitwood/Getty Images
Syria refugees journey through Europe
A young boy walks along the train tracks at dusk at the Greek-Macedonian borderDan Kitwood/Getty Images
Syria refugees journey through Europe
Syrian refugees make a list of the people travelling in their group as they wait at a border crossing on the Greek-Macedonian borderWin McNamee/Getty Images

Greek and Macedonian border authorities have been letting migrants and refugees through in groups of about 50 at a time.

The Macedonian government has organised trains twice a day heading north towards Serbia. Due to large numbers of people crossing from neighbouring Greece, authorities also sometimes provide buses for transport.

Those who can afford it negotiate with local taxi drivers to take them to the Serbian border.

Syria refugees journey through Europe
A Macedonian man sells water to migrants held inside a campWin McNamee/Getty Images
Syria refugees journey through Europe
After crossing the Greek-Macedonian border and having their papers processed, people head out of a transit area towards Gevgelija train station to find transport north to the Serbian borderDan Kitwood/Getty Images
Syria refugees journey through Europe
A Macedonian border guard asks all Syrians to raise their hands shortly after they crossed the border from GreeceWin McNamee/Getty Images
Syria refugees journey through Europe
A Macedonian border patrol leader (left) speaks with his Greek counterpart after allowing a group of 50 Syrian migrants to cross into MacedoniaWin McNamee/Getty Images
Syria refugees journey through Europe
Migrant and refugee families take a train from Gevgelija in Macedonia to the Serbian borderDan Kitwood/Getty Images
Syria refugees journey through Europe
Passengers pack into an overcrowded train from Gevgelija to the Serbian borderDan Kitwood/Getty Images
Syria refugees journey through Europe
A child is seen through the window of a bus carrying people towards the Hungarian border after they received travel documents at a processing facility in Preshevo, SerbiaDan Kitwood/Getty Images
Syria refugees journey through Europe
After crossing the Greek-Macedonian border and having their papers processed, families negotiate with a taxi drivers over the fare for the two-and-a-half hour drive to the Serbian borderDan Kitwood/Getty Images
Syria refugees journey through Europe
A taxi driver counts his money after dropping off a Syrian family in Tabanovtse, Macedonia, near the Serbian borderWin McNamee/Getty Images

About 2,000 people a day cross into Serbia from its southern border with Macedonia, which puts further strain on Serbia's already struggling economy. Serbia gives refugees 72 hours to decide if they want to seek asylum there, or continue on into Europe.

The travellers who enter Serbia head to a recently opened reception centre in the town of Presevo, where they receive medical aid, food and papers legalising their transit through the country.

Syria refugees journey through Europe
Thousands of people wait in line with their bags for travel documents to be issued at a processing facility in Presevo, SerbiaDan Kitwood/Getty Images
Syria refugees journey through Europe
Travellers' bags are lined up at a Serbian processing facility in PresevoDan Kitwood/Getty Images
Syria refugees journey through Europe
A dispute over positions in line escalates while people wait for their travel documents to be issued at a processing facility in Presevo, SerbiaWin McNamee/Getty Images

The migrants and refugees are then bused north to Belgrade. A park in the middle of the Serbian capital Belgrade has become home to thousands of refugees trying to get into Europe. Locals have started calling the park "tent city" as it has been taken over by thousands of refugees who passing through Belgrade on their way to Europe.

Some refugees sleep in tents, but most are out in the open. The park's water sources are used for bathing.

Syria refugees journey through Europe
A young boy prays on a park bench in a public park near the train station in BelgradeDan Kitwood/Getty Images
Syria refugees journey through Europe
Men wash themselves and draw drinking water in a park near the train station in BelgradeWin McNamee/Getty Images
Syria refugees journey through Europe
Freshly washed clothes are left to dry on a shrub in a public park near the train station in BelgradeWin McNamee/Getty Images
Syria refugees journey through Europe
A young Syrian girl sits on the floor of the bus station in Belgrade, where she temporarily lives with her mother, father and baby sisterWin McNamee/Getty Images
Syria refugees journey through Europe
Men walk through the main train station in Belgrade, Serbia.Dan Kitwood/Getty Images

The right-wing government of Prime Minister Viktor Orban, one of Europe's most vociferous critics of mass immigration to Europe, has vowed to cut illegal border crossings from Serbia to zero, with a 175km barrier and stringent new laws. Construction crews are completing a 3.5-metre high fence along the length of Hungary's border with Serbia to keep migrants out.

Hungary says it has no choice, having registered 165,000 migrants entering this year, flowing through the Balkan peninsula by boat and dinghy from Turkey to Greece and then over land through Macedonia and Serbia. Orban has painted Europe's worst refugee crisis since the Yugoslav wars of the 1990s as a threat to European prosperity, identity and "Christian values".

Syria refugees journey through Europe
Syrian refugees check the GPS on their phones before they cross the Serbian border with HungaryWin McNamee/Getty Images
Syria refugees journey through Europe
Refugees cook corn they foraged from nearby fields as they rest near the Hungarian border in Horgas, SerbiaWin McNamee/Getty Images
Syria refugees journey through Europe
Aid workers distribute food to migrants at a transition camp in Magyarkanizsa, SerbiaDan Kitwood/Getty Images
Syria refugees journey through Europe
An aid worker distributes bread and supplies to migrants and refugees at a transition camp in Magyarkanizsa, SerbiaWin McNamee/Getty Images
Syria refugees journey through Europe
Migrants walk along railway tracks to cross into Hungary from SerbiaWin McNamee/Getty Images
Syria refugees journey through Europe
Migrants cross from Serbia into Hungary along railway tracksDan Kitwood/Getty Images
Syria refugees journey through Europe
Razor wire marks the border between Hungary and SerbiaWin McNamee/Getty Images
Syria refugees journey through Europe
Migrants and refugees stand on a deserted watch tower at the Serbian-Hungarian borderDan Kitwood/Getty Images
Syria refugees journey through Europe
People wrap themselves in blankets to keep warm at a collection point in Morahalom, HungaryDan Kitwood/Getty Images
Syria refugees journey through Europe
People who had crossed the Serbian border into Hungary keep warm by a fire as dawn breaks at a collection point in MorahalomDan Kitwood/Getty Images
Syria refugees journey through Europe
Children who had crossed from Serbia into Hungary wait for buses to take them to a refugee campDan Kitwood/Getty Images

Many migrants and refugees have faced hostility in Hungary. Thousands have been kept waiting at the main train station in Budapest, while the authorities have attempted herd others back into a transit camp. Still others have been so desperate that they have begun walking towards Austria and Germany.

IBTimesUK will publish another gallery detailing the next leg of the journey to western Europe.