No; there are literally hundreds of pyramids scattered all over central and southern Mexico, such as Monte Alban, the pyramids of the Sun and the Moon in Teotihuacan, the Great Pyramid of Cholula (with the largest volume in the world), El Tajin and many, many more.
Mayan pyramid
There are a lot of El Castillos, but the original was built in Chichan Itza, Mexico.
The Pyramid Of Niches is located in El Tajin Mexico.
It was built by the Maya civilisation sometime between the 9th and 12th centuries AD
The Chichen Itza in Mexico is made of limestone blocks quarried nearby. The main pyramid, El Castillo, was built in layers with each layer painted in red and other colors.
El Castillo del Cacao.
Chichén Itzá Is the ruins of a Mayan city so it cannot be defined in height. The tallest pyramid there is "El Castillo" at 30 metres total.
El Castillo is in Chichén Itza. Where specifically? I don't know...
The population of El Castillo - municipality - is 19,864.
El Castillo Interior was created in 1577.
The central pyramid at Chichén Itzá is the temple of Kukulkan, named for the Mayan feathered serpent deity and nicknamed El Castillo ("The Castle") in Spanish.
El Castillo is a Meso-American step pyramid that was built by the Mayan civilization between the 9th and 12th centuries. The pyramid is thought to have been built as a tribute to their god Kukulkan, a feathered serpent deity.