Hidee Gold Mine, Central City

There's a treasure greater than gold down in Hidee Mine: history. Oh, but there's gold, too, in case you were wondering. Miners have been pulling this sought-after metal out of the ground since 1896. In fact, the mineshaft pierces one of the earth's richest ore deposits (it's produced more than $5 billion in gold and silver over the years), and these mine tours dive deep into that sparkling history.

For those seeking a more hands-on experience, visitors can even pan for gold ore specimens and other gems as souvenirs from the onsite panning area—after all, they keep it "stocked" so little ones can experience the thrill of treasure-hunting firsthand.