Floor for animals such as cattle, comprising a base structure and a top layer, wherein the top layer is permeable to fluid portions of animal faeces and/or animal urine, but impermeable to solid parts of the animal faeces, wherein the base structure comprises voids for receiving said fluid portions and/or urine passing through the top layer, wherein the base structure comprises an array base elements forming a substantially continuous deck supporting the top layer, wherein the deck is arranged for passing said fluids into internal volumes of the base elements forming said voids, the internal volumes of at least a number of said base elements being in fluid communication with each other, preferably such that fluids received in said internal volumes can be removed from the base elements by flow through said internal volumes.