Białowieża is the last of the forest that once covered the European Plain, on the border of Belarus and Poland, and nothing in it is tidied. An oak that came up five centuries ago falls when it is ready and stays where it lands, moss-furred, sinking back into the soil. That is the whole difference. Everywhere else on the plain the dead wood was taken out; here it was left, and the forest still runs on it. Any of this survived because kings wanted somewhere to hunt: a royal reserve from 1541, it kept its trees while the land around it went to field.
The trails take you through the old stands and then onto boardwalks over black-alder swamp, where duckweed lies on still water in a green that looks lit. The air goes cool and close, and the mood changes from the dry oak ground behind you. At dawn fog comes off the lakes and catches the low sun, with swans somewhere inside it. In spring eight species of woodpecker drum through the old growth, which is the loudest this forest gets. From late September the oaks and hornbeams go gold and rust, and you hear the stags bellow across the clearings before sunrise. Winter is when the bison come out: the herds gather at the hay racks and stand black against the snow, which also holds whatever crossed in the night, readable at your feet. One thing was taken out of this forest. The last wild European bison here was killed in 1919, and the animal survived only in zoos. Every one alive now descends from twelve of those animals, and the herd in this forest from seven. Since 2022 a steel barrier has run through the Polish half, and the forest caught between it and Belarus's older fence is a pocket an animal can get into and not out of. They are back on the ground their ancestors were shot off, and the risk to them now is not hunters but how closely related they all are.