Palenque was a Mayan town which vanished in the 8th century. It's also the name of a nearby town, which serves as a base for visitors of the site. There are plenty of mini-vans transporting visitors from the center of the modern town to the visitors center, where tickers should be purchased. From there to the site one can take another bus or just walk.
Provided coordinates are of the main pyramid of the site, known as "Templo de Las Inscripcions" ot Temple of the Inscriptions.
There is a long and detailed article about Palenque which is advised and this is the introduction:
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visit link)
"Palenque, also anciently known in the Itza Language as Lakamha' ("Big Water or Big Waters"), was a Maya city state in southern Mexico that perished in the 8th century. The Palenque ruins date from ca. 226 BC to ca. 799 AD. After its decline, it was overgrown by the jungle of cedar, mahogany, and sapodilla trees, but has since been excavated and restored. It is located near the Usumacinta River in the Mexican state of Chiapas, about 130 km (81 mi) south of Ciudad del Carmen, 150 meters (490 ft) above sea level. It averages a humid 26°C (79°F) with roughly 2,160 millimeters (85 in) of rain a year.
Palenque is a medium-sized site, smaller than Tikal, Chichen Itza, or Copán, but it contains some of the finest architecture, sculpture, roof comb and bas-relief carvings that the Mayas produced. Much of the history of Palenque has been reconstructed from reading the hieroglyphic inscriptions on the many monuments; historians now have a long sequence of the ruling dynasty of Palenque in the 5th century and extensive knowledge of the city-state's rivalry with other states such as Calakmul and Toniná. The most famous ruler of Palenque was K'inich Janaab Pakal, or Pacal the Great, whose tomb has been found and excavated in the Temple of the Inscriptions. By 2005, the discovered area covered up to 2.5 km2 (1sq mi), but it is estimated that less than 10% of the total area of the city is explored, leaving more than a thousand structures still covered by jungle. Palenque received 920,470 visitors in 2017."
Visit Instructions: To log your visit to this Waymark, post a picture of your GPSr next to the artifact. Post a second, wider picture to show the "Ancient Evidence" in context.