Crystal Grottoes
...that Crystal Grottoes is the only show cave in the U.S. state of Maryland?
...that <b id="mwUQ"><a href="./Crystal_Grottoes" id="mwUg" rel="mw:WikiLink" title="Crystal Grottoes">Crystal Grottoes</a></b> is the only <a href="./Show_cave" id="mwUw" rel="mw:WikiLink" title="Show cave">show cave</a> in the <a href="./United_States" id="mwVA" rel="mw:WikiLink" title="United States">U.S.</a> state of <a href="./Maryland" id="mwVQ" rel="mw:WikiLink" title="Maryland">Maryland</a>?