Berlin lidos close in September, but swimming stays legal all year in the right lakes. Here is where you can get in between October and March, how fast each lake cooled last winter by the city gauges, the groups and public ice swims, and how to start without getting hurt.

Zoo, Aquarium and Tierpark Berlin sell four annual cards, family versions of each and a cheaper subscription with a two-year catch. Whether one pays off depends on how your household really uses the three places. Here is what each card costs, when it overtakes day tickets, and what changes with the new card from 2 November.

Berlin has two public observatories that open their big telescopes to anyone with a €12 ticket, several nights a week from October to December. What you actually see depends on the night you pick: the Moon, the hour and Saturn's height above the trees. Here is how the Archenhold and Wilhelm-Foerster nights work, which weekends are darkest, and the one night I would book.

Six thermal baths sit within a regional-ticket ride of Berlin, and the pool is rarely what decides the day. The timetable does: when you reach the door, when the pools close and when the last connection gets you back to Hauptbahnhof. Here is what a Saturday costs at Ludwigsfelde, Bad Saarow, Neuruppin, Bad Belzig, Templin and Burg, and which one fits the day you have.

Berlin has 14 fixed blood and plasma centres, and they could hardly be more different: one pays 20 euros for a bag, another pays nothing, and the plasma chains do not print a rate. Here is who pays what, how often you are allowed to give, where you can go on a Saturday, and the language rule that stops many English speakers at the desk.

Berlin taxes any flat registered as your Nebenwohnung at 20 percent of the net cold rent, up from 15 percent, and since 2025 a room in a shared flat counts too. Here is who actually pays, how a WG share is calculated, the month rules and deadlines that decide the bill, and the one exemption most couples miss.

Berlin has more than 80 housing cooperatives holding roughly 190,000 flats, and the advice always stops at the word itself. Here is the rest: what the shares cost by flat size, why the money takes about three years to come back, how long the waiting lists really are, and the interest-free Berlin loan that pays the shares for you.

Kindergeld is 259 euros a month for every child, it does not depend on what you earn, and the Familienkasse pays it back exactly six months from the month your application arrives. Six lost months are 1,554 euros. Here is who is entitled, what the office needs, and the one deadline that repeats on the first of every month.

Berlin has 82 social preservation areas covering 5,318 hectares, and inside them a single rulebook decides what an owner may build. Merging flats, a second bathroom, underfloor heating and turning a home into a holiday let are all refused outright. Here is how to find your area and what the protection is actually worth.

Only 45.9 per cent of measured German households get the full download speed their contract promises. Here is what fibre and cable really reach a Berlin flat, the exact measurement campaign that counts as proof, and the three tests that let you cut the bill or walk out of the contract without notice.

There is a line on your payslip marked Kirchensteuer that most English speakers in Berlin never read. Here is what it costs in euros, which of the ten courts takes your declaration, and why signing on 29 September and signing on 2 October are a full month of salary apart.

Berlin has pumpkins everywhere in October, but a field you can pick from yourself is rare. Inside the city there is one real harvest, for one weekend. Here is where it is, which pumpkin shows and festivals are worth a Saturday, and how long each one takes from Alexanderplatz.

Berlin has more than 240 cargo bikes you can borrow for free, at bookshops, cafés and libraries in every district. The catch is the weekend: only 70 hand over on a Saturday and 12 on a Sunday. Here is how the fLotte works, what you need for the first booking, and how to get a bike for Saturday anyway.

Autumn leaves in Berlin follow a tighter calendar than most people think. Eleven years of weather service records put the beech peak in the last full week of October, the clocks go back right in the middle of it, and most woods around Berlin are pine. Here is when and where to go.

Tens of thousands of cranes fly in to roost at Linum every autumn evening, about 40 km from Berlin. The peak usually comes in mid October, the last direct bus leaves before dark, and this season no bus runs at the weekend. Here is how to plan an evening that works.