Hidee Gold Mine
Hidee Gold Mine has one special feature: visitors are allowed to mine their own specimen of the gold vein while on tour. The passages are well lit, level and generally high, so this is a rather comfortable tour. showcaves.com
Colorado Grotto
1st Thur 7:30 p.m. Friends Meeting House Corner of Columbine and Iliff nssio.org
Fault Caves
The Fault Caves are a series of fissures in the mountain with several entrances created when a fault line in the mountain started to slip. There are no decorations here, and it's very dry and dusty. There's lots o... backcountrysecrets.com
Mallory Cave
Mallorys is a small sandstone shelter cave consisting of one undecorated room. Boulder Mountain Parks closes this cave from June through October because of the nesting bats inside. Please respect the fences to pro... backcountrysecrets.com
Front Range Grotto
3rd Wed. of the month, 7:30pm, Upstairs Community Room, O'Meara Ford Dealership, 400 W. 104th Ave., Northglenn, CO 80234 nssio.org