Grutas de Cacahuamilpa National Park
... that the Grutas de Cacahuamilpa National Park in Mexico includes one of the largest cave systems in the world, with some openings wide enough to be used as concert halls?
... that the <b id="mwAZQ"><a href="./Grutas_de_Cacahuamilpa_National_Park" id="mwAZU" rel="mw:WikiLink" title="Grutas de Cacahuamilpa National Park">Grutas de Cacahuamilpa National Park</a></b> in <a href="./Mexico" id="mwAZY" rel="mw:WikiLink" title="Mexico">Mexico</a> includes one of the largest <a href="./Cave" id="mwAZc" rel="mw:WikiLink" title="Cave">cave systems</a> in the world, with some openings wide enough to be used as concert halls?