Westend

EU/EEA/Swiss citizens need only ID. Many others (US, Canada, Australia) can visit visa-free for up to 90 days. Check with German embassy.

Yes, especially in hotels, restaurants, and tourist areas. Younger locals speak good English.

Euro (€). Credit cards are accepted in most places, but some smaller shops prefer cash.

From Berlin Brandenburg Airport (BER), take the RE7 or RB14 train to Berlin Hauptbahnhof, then S-Bahn to Westend (about 45 minutes). Taxi costs €40-50.

Yes, along the Havel River and lakes like Großer Wannsee, with sandy shores and swimming areas.

Yes, tap water is of high quality and safe to drink.

Round up the bill or tip 5-10% in restaurants. Say 'Stimmt so' (keep the change) when paying.

Yes, EU roaming is free for EU citizens. Others can buy a local SIM for around €10.