Uaxactún, an ancient Maya site 23 km north of Tikal, is Mesoamerica’s oldest astronomical observatory where spring equinox was tracked centuries ago. Inhabited from ~900 BC to ~900 AD, it features the first known corbel arch. Tikal, the powerful Maya capital peaking 200–900 AD, spans vast ruins with iconic temples and plazas. This day tour combines both for a deep dive into Maya astronomy, architecture, and history.