Crystal Lake Cave

6684 Crystal Lake Cave Road
Dubuque, IA 52003

563-556-6451

In 1868 lead miners drilled 40 feet into the ground to find traces of a rich lead vein. In this process they found very little lead, but instead discovered a natural geological wonder of matchless beauty. In 1932, the late Bernard Markus, (one of the original lead miners),  opened the cave to the public, naming it Crystal Lake Cave.

Please use "Flag This Place" to alert us about content that is inappropriate or needs immediate attention. Nothing you submit will be shared with other site visitors.
Explore the free AARP HomeFit Guide

Upcoming AARP Events

View All AARP Events

image of two AARP membership cards
Only $12 your first year with Automatic Renewal
  • Immediate access to your member benefits
  • Discounts on travel and everyday savings
  • Subscription to AARP The Magazine
  • FREE second membership
Join AARP
Already a member? Renew or Print Card