The top archaeological sites are
El Tajin, Teotihuacan, Monte Alban, Palenque,
Uxmal and Chicken Itza
The top cities (sights not size) are
Mexico City, Puebla, Zacatecas, Querétaro, Oaxaca, Guanajuato, Morelia, Pátazcuaro, San Cristobal de las Casas and Merida
Top natural sights are
Copper Canyon, the Monarch Butterfly Reserves, Cañon de Sumidero, yhe Popcatepetl Volcano and the Caribbean and Pacific coasts.
The top beach areas
the south of Baja (los Cabos), the central Pacific coast centered around Puerto Valllarta, The Oaxacan coast (including Puerto Escondido and los Bahias de Huatulco), the Caribbean coast of the Yucatan peninsula (includes Cancún, Playa del Carmen and the island of Cozumel)