Elie is there any ATM machine nearby ?
You can use any ATM that accepts your type of card (Mastercard and Maestro are available at bunq). That should be almost all ATMs world-wide. Keep in mind some ATMs might charge you fees for withdrawals. That depends on the bank/provider of the ATM you're using and is displayed when you attempt a withdrawal.
Same question if I want to put cash money and add it to my account.
bunq has cooperations with Paysafe:cash and Barzahlen/viacash. Depending on the country where you live in, you should be able to find a partner store where you can scan a barcode from the app and then deposit cash.
For Barzahlen/viacash: https://together.bunq.com/d/14531 (Germany, Austria and Italy -- also supports withdrawals at the store)
For Paysafe:cash: https://together.bunq.com/d/45741 (Belgium, Bulgaria, Croatia, Republic of Cyprus, Czech Republic, France, Greece, Hungary, Ireland, Latvia, Lithuania, Luxembourg, Malta, The Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain and Sweden -- only deposits at the store, use ATMs for withdrawals)