Penn's Cave showcases the beauty of unaltered nature. Lighting throughout allows for plenty of photo opportunities. Boat tour through the cave is led by a knowledgeableguide.
Sit towards the back of the boat so you have more room to turn and look around. Left side has good views of "The Garden of the Gods"; while right side has a great view of the "Western Scenery".
Despite feeling like a massive tourist trap, there is a ton of history here and the prices aren't too bad either. The 50min trip through the cave feels short, only because you won't want it to end!
Splurge and do the combo pack - maze, cavern & wildlife tour. All of the guides were great. Note: the maze is fun for adults too. Don't let it fool ya! It only LOOKS simple.
Boat guide was pretty cool. You can buy bags of sand from the gift shop & pan for various gemstones. If you like to Geocache/Earthcache, there is an Earthcache for the site.