A "long rectangle" lined with ruin structures along both sides is this site (actually I would say more of an "appearance of long length" due to its fairly narrow width but yes you can walk back that length in like 5 minutes from the far end after seeing all the structures) where I was most impressed by these two temples or palaces with multiple rows of short vertical pillars which quite likely is a style "unique to the Yucatan" having seen one such structure at the small San Miguelito site adjacent to the big Mayan Museum right in Cancun & was also to see later on another one at Chichen-Itza (on a "grander scale" though with a lot more rows of those pillars) but having seen none such structure at the sites further down south in Central America (Copan, Tikal & Xunantunich) and also later on at Teotihuacan which is outside the Yucatan. In any case, not much time is needed at this site with all the structures being "relatively small" which are also either roped off or with signs on their steps not to go up (also another uniqueness of the management style or such of the sites in the Yucatan with the site structures "just for viewing", unlike those outside the Yucatan where I was able to go up their pyramids & such to enjoy those structures "up close").
And nearby, actually pretty much just across the street from this site (to the left on Blvd. Kukulcan after coming out of here and across the street shortly afterward) is a "viewing deck" overlooking the beautiful Playa Delfines (with a number of straw umbrellas on that "pretty wide" beach) & the "deep-blue" sea beyond and where also to do is a nice photo-op with the big colorful 'Cancun' sign at just steps away from the deck. Also, not too close to this site but just at a 5-to-10-minute bus ride to the north (from across Blvd. Kukulcan where there's actually a bus stop right in front of the 'Cancun' sign) is Museo Maya de Cancun with the adjacent small ruin San Miguelito (as mentioned above) where yes both the indoor displays & the outdoor ruin are "fairly average" but overall a worthwhile site.