Park structure is a term that refers to the various structures that can be found in parks. A GAZEBO is a freestanding structure, usually made of wood or metal, with a roof and open sides that is often found in parks. A TRAILER is a type of vehicle that is towed by another vehicle and is often used as a temporary residence in parks. A SUMMERHOUSE is a small building, typically made of wood, that is used as a shelter from the sun and rain in parks.