Lectures For Lifelong Learners!

Greg Brick

Greg Brick

Greg Brick


Minnesota's Caves

Available for in-person lectures in:

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Greg Brick Ph.D. was employed as a hydrogeologist at several environmental consulting firms and has taught geology at local colleges and universities. He has published more than 200 articles and was the recipient of the 2005 Cave History Award from the National Speleological Society. His first book, Iowa Underground: A Guide to the State’s Subterranean Treasures, was published by Trails Media Group in 2004. His second book, Subterranean Twin Cities, published by the University of Minnesota Press in 2009, won an award from the American Institute of Architects. His third book, Minnesota Caves: History and Lore, was published by The History Press in 2017 and was nominated for the Minnesota Book Awards. His latest project, Caves and Karst of the Upper Midwest, published in 2021, is an academic volume of contributed chapters by experts on each of the states covered. His work has been featured in National Geographic Adventure magazine as well as on the History Channel. He has led guided tours of caves for the Minnesota Historical Society and the University of Minnesota College of Continuing Education. He established the Minnesota Spring Inventory at the DNR and mapped thousands of springs around the state.

Lectures include:


Minnesota has many caves, some known nationally. Carver’s was the earliest cave in what is now the US to be described in published literature after Jonathan Carver’s visit ten years before the Revolution. Fountain Cave was the birthplace of the capital city, St. Paul. Specialized uses included for beer, cheese, mushrooms, and as nightclubs. Mystery and Niagara are the state’s best known show caves. Far north, the violent waves of Lake Superior hammered out caves accessible only by kayak. Other caves were purely mythical. Learn about all of them from the geologist who wrote the book on the subject.


In Subterranean Twin Cities, geologist Greg Brick takes us on an adventurous educational tour into the caves and tunnels that make up the Twin Cities’ fascinating underground landscape. Brick shines a headlamp into the labyrinths beneath the streets and reminds us that what we see aboveground is only half the story. Novel geological and historical insights from each chapter of the book will be highlighted.

Geological Wonders of Florida

Take a tour of Florida's surprisingly diverse geology and learn new things about some very old places. Based on the presenter's caving, SCUBA, and rockhounding experience in the state, places such as the Devil's Den, Devil's Millhopper, Florida Caverns, hot and cold springs, sinkholes, and strange beaches, will be featured. Rather than focusing on the usual tourist traps, the educational value of these various locations will be emphasized.

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