bottomless pit
... that there has been a bottomless pit in East Flagstaff, Arizona, for more than 100 years?
... that there has been a <b id="mwClo"><a href="./Rio_de_Flag" id="mwCls" rel="mw:WikiLink" title="Rio de Flag">bottomless pit</a></b> in East Flagstaff, Arizona, for more than 100 years?