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Valeriana

Location	Campeche, Yucatán Peninsula, Mexico
Conventional date	Classic Maya city, peak about 750–850 CE (as reported).
Alternative date proposals	None with significant published support that we know of.
What is measured	Identified in 2024 from reprocessed environmental LiDAR; 6,674 structures in the survey area. [1][2]

Found not by new fieldwork but by re-reading LiDAR collected for forest monitoring, a sign of how much remains hidden.

Claims about this site

Claim	Status	Verdict
LiDAR shows Maya lowlands were far more densely settled than thought	Mainstream	Measured: far denser settlement than mapped before

Sources

Auld-Thomas, L. et al. (2024). Running out of empty space: environmental lidar and the crowded ancient landscape of Campeche, Mexico. Antiquity. doi:10.15184/aqy.2024.148 data
INAH bulletin (2024). Dan a conocer Valeriana, un nuevo sitio arqueológico descubierto en la selva de Campeche. https://www.inah.gob.mx/boletines/dan-a-conocer-valeriana-un-nuevo-si… background
Canuto, M. A. et al. (2018). Ancient lowland Maya complexity as revealed by airborne laser scanning of northern Guatemala. Science 361. doi:10.1126/science.aau0137 data

Dates are summarised in our own words from the sources listed. Conventional and alternative dates are both reported; "measured" lists only dated or documented findings. Methodology.