The innovative wall-mounted structure fits perfectly on the window sill wall, and is securely installed with hidden metal brackets and thicker non-slip pads. Combining the functions of a pet bed and a cat perch, the upper flat bed surface with a removable soft cushion is for cats to laze around; the lower hollowed-out pedals and tilted climbing surfaces satisfy cats' natural instincts to jump and sharpen their claws, turning the window sill into a cat sports paradise in a second