When the Landmark opened, it had a total of 400 slot machines. The ground-floor casino was , while a second casino, consisting of , was located in the dome on the 29th floor; it was the first high-rise casino in the state. At the time of opening, the ground-floor casino featured red and black colors, while the upper casino used orange coloring and wood. The hotel contained 476 rooms and 27 suites for a total of 503, a small number in comparison to other Las Vegas resorts, which commonly had 1,000 rooms. The tower included 157 hotel rooms, while the remaining units were located on ground level. The tower used an octagonal floorplan, and the rooms in the tower used a layout that had them shaped like pie slices. By 1977, the room count had increased to 524, before ultimately being lowered to 498 at the time of the Landmark's closure in 1990.