In what looks like a disused underground metro station near the Portuguese Synagogue lies Tun Fun, a children's paradise. If you can't find it just follow the steady stream of families, children's parties and school excursions into the depth of this enormous playground that includes slides, climbing labyrinths, painting workshops, trampolines and other attractions. The screams of the children can be a bit overwhelming at times but internet access and cans of beer at the café help keep the cacaphony of pre-pubescent chatter at bay. Adults are only admitted with children and only have to pay an entrance fee for their kids.