Final answer:
El Mirador is famous for its massive pyramid-like structures, but the reference provided does not name a specific pyramid at this site. It is one of the significant achievements of the Maya civilization resembling El Castillo at Chichen Itza, known as the pyramid of Kukulkan.
Step-by-step explanation:
The lowland Maya site El Mirador is notably recognized for its massive structures, including the grand earthen truncated mound, one of the most massive structures in the region, rising over 34 meters. Although the known names of specific pyramids at El Mirador are not provided in the reference material, this archaeological site is famous for its ancient pyramid-like structures, which testify to the sophisticated architectural achievements of the Maya civilization. Additionally, contrasting with the pyramid of Kukulkan at Chichen Itza, known as "El Castillo", which serves as a prime example of the artistic and architectural prowess of the Maya people.