Fantastic experience at the Cosmos! - Awesome experience. I highly recommended and I think it is great for families. Kids find it fascinating. I will be back with my grandkids for my next visit.

The mistery - Kacey aka, Chuck, was great tour guide, very knowledgeable highly recommended... My wife and I had a great time.

Mystery Challenge! - You need to visit this gem of a family attraction in the Mt. Rushmore area! We had a fun and intriguing 40 minute tour with our terrific guide Maggie. Enjoy the beautiful wooded area and the challenge of figuring out the mystery. There's some big steps along the path with plenty of railings and places to rest. Finding and cutting a geode makes for a pretty cool souvenir! There's fun and learning for all ages at Cosmos Mystery Area. Highly recommend!

The Real Deal! - Had an amazing time at The Cosmos Mystery Area yesterday. Why is it called the mystery area, and not the mystery house? Well, you'll have to go on your own to find out! This is the third mystery / vortex area I've been to around the country, including The Mystery Spot in California, and I can honestly say that the gravitational pull that I felt here was stronger than that one. Maggie was an excellent tour guide, and the group I was in covered the age spectrum. There is a slight incline with steps to access the mystery area, but it is a gradual rise into a beautifully wooded area. This tour is geared towards all ages, as any in all ages can wonder in the delight of this mysterious natural area. If you have vertigo like I do, or get motion sickness, it's suggested to take a Dramamine before going. I did so, and had no issues. Excellent staff, conveniently located en route to either Rapid City or Mount Rushmore, and an absolute must see if you're visiting the Black Hills.

Loved it! - Loved it! I remember doing this as a kid 25 years ago. Brought our kids back (ages 12,10,5) and all loved it. Family friendly.

Cosmos - So so cool!!! Definitely recommend!! Tour guide was awesome. Only about 40 minutes but worth it! Go to cosmos if you get the chance

Our 8yo & 10yo boys loved it! - Our 8 & 10-year-old boys loved it! The tour guide got all of the kids and some adults involved in trying out the fun and wacky things. It was one of our favorite tours we did in the Black Hills! We would definitely visit again!

Crazy and weired experience! - Totally wiered and crazy experience. I can 110% recommend it! I shall newer forget the Mystery House comprised by two rooms....!

Great family time and a South Dakota tradition. - We live in Eastern South Dakota, and a trip to Cosmos was a must when coming over to the Western side of the state. Cosmos, even for South Dakotans, is almost a tradition at this point, we came as kids when our parents brought us, and now we are bringing our kids back for what we know is a fun, quirky, must do activity in the Black Hills. Our tour guide, Jack, was a very fun and energetic college student that put on a great tour for not only the kids in the group but also the parents. The tour took about an hour and required somewhat good balance and good stamina for walking up steep graded hills and balancing yourself at strange angles.

Pricey. Kids like it. - It's ok. They run a tour every 15 or 20 minutes all day. As such, there is always a tour ahead of your group, and another right behind you, as the guides herd their groups to each spot. Visitors are assigned to a time slot with a group of about 25-30. On a weekday in early June, it was about a 45 minute wait until our tour began. The tour guide was very enthusiastic and animated, and it was entertaining, even though it's more about physics than mystery. The site contains various optical illusions that make it seem as if people and objects defy gravity - balls roll backward, etc. Visitors walk up a fairly steep trail to some designated spots that appear level, but in fact, are not. This creates the illusion of height differences depending on the side each volunteer stands on. Further up, the group enters a small shack built at a steep angle. This creates the illusion of a gravitational force as the body naturally leans downhill. Children and adults seemed to enjoy it. The tour itself lasts about 35-40 minutes. I visited a mystery spot in California as a child, and naturally, it was a lot more fun (when I believed it was a location with a mysterious gravitational force) than now as an adult. It was pleasant enough, but there are so many more impressive things to do and see in the Black Hills area. If you're willing to throw down $20 per person for a family activity, your money would probably be better spent at one of the nearby cave or mine tours, adventure parks, or that bear country park. Other visitors really raved about this place, though, so if you like illusions, or you think your kids will be wowed by them, then this is a fairly quick activity that can be squeezed into less than half a day.