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    Onyx Cave

    4.8 (49 reviews)
    Closed 9:00 am - 5:00 pm

    Onyx Cave Photos

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    Reviews With Photos

    Tess H.

    My family really enjoyed our visit at onyx cave. The 30 minute tour was just the right amount of time with our younger children(our older children enjoyed as well). They stayed interested the whole tour. Our tour guide Autumn was friendly, so sweet with the kids and informative. The rock shop was fun, lots of cool treasures. Staff was friendly.

    Stephania P.

    Cute store. Cool tour. Staff were friendly, and wrapped everything I bought. Love the care they took. The rocks aren't completely over priced like everywhere else. Really happy to have randomly stopped here. 5 stars!

    Hailie Z.

    Came to visit from Indiana. Definitely love seeing new things and THIS IS A MUST!! Especially if you love exploring nature! It was very affordable for a tour and the staff was awesome! Our tour guide Autumn was super awesome and took her time to show us the amazing cave!

    Verity of gems and minerals
    Turk A.

    I have not visit Onyx Cave for the cave yet only their Rock Shop. Today was my first time in. They have a lot of great options of gems/mineral polished and in their natural form. The couple that were running the shop tonight were really friendly and nice. After viewing the pictures of the cave on here I will have to come back and check it out before I move out of town. I should be back for a tour in the next day or two. I found some beautiful stones I purchased. Btw here is a hint to find some cool fossils. If you search through their barrels of geodes you can find some Geodized Gastropod Fossils.

    Beautiful structures and by far the best cave we saw! Fun for everyone and our tour guide was a blast.

    Annette P.

    Onyx Cave is one of my favorite caves in the Mammoth Cave area. I've been here several times and always leave happy. The beauty of this cave is amazing and it's not too hard of a trip for people of all ages. Missy is wonderful and her knowledge and patience always impress me. I look forward to visiting this cave again!! Plus now I have a super cute bat hat!!!

    Timothy B.

    The tour was educational. My Friends and I were on a small group tour given by the owner. She was full of information on the hows and whens of the cavern. My friends and I did two different caves tours, and Onyx came was the most educational and equally as jaw-dropping as the Crystal Onyx cave. You will get your money's worth.

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    2 months ago

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    3 years ago

    Very cool experience. Lots of formations and the tour guide was informative. Very well lit.

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    3 years ago

    Nice short tour of the cave if you don't want anything to strenuous staff was very friendly

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    8 years ago

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    5 years ago

    Amazing Tour! We loved it sooo much and we highly recommend this as place to stop! #goddessandwolf Certified! We would definitely go back!!!

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    8 years ago

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    6 years ago

    Friendly tour guides. A lot of interesting formations. If you don't like tight spaces probably not for you.

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    5 years ago

    For the size it's a nice tour. It kept the kids attention and the tour guide was very knowledgeable.

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    Page 1 of 2

    Ask the Community - Onyx Cave

    Review Highlights - Onyx Cave

    Up close as personal tours given by Missy, whose is a volunteer caver of 100's of caves in the area.

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    Hidden River Cave & American Cave Museum - World's largest underground suspension bridge

    Hidden River Cave & American Cave Museum

    4.5(80 reviews)
    5.1 mi

    For the last couple years my wife and I have taken to doing cave tours. We've done several in the…read morearea and only made it to Hidden River Cave & American Cave Museum recently. Unlike some cave attractions, you have to make a reservation to visit Hidden River. It's easy via their website. Once you arrive you can check in at the desk and then tour the museum and gift shop before your cave tour begins. The museum is self-guided and is two stories' worth of exhibits. There's a staircase that takes you down to the lower level where you'll find just as many exhibits as their is on the main floor. Everything is presented nicely, well lit, and informative. Shortly before your tour begins your tour guide will introduce himself, give you a brief overview of the cave, and then do a Q&A before heading to the cave entrance. This cave tour begins by descending some steps. A Lot of steps. The opening is very impressive, and as you ascend you can feel the temperature drop. A brief pause at the bottom of the steps and our tour guide pointed out some of the machinery left over from various uses of the cave in the past. Then it's into the cave. I love cave tours because it puts you in a place that's nothing but history. They're made by nature, often hidden for centuries, and, for all intents and purposes, somewhere that man isn't really intended to go...but we're Mankind and we do that kind of thing. Once inside the cave there are areas that are expansive and areas that are terrifically narrow. I love large, open spaces underground. Sometimes you have to remind yourself that your anywhere from 50 to over 100 feet below surface. In a fashion, it's a bit humbling. At the same time, you have to remind yourself that you're actually below a downtown area. The suspended bridge was definitely a highlight of this cave tour. Cleverly designed and installed, I'd almost consider an underground wonder. A little further along you come to the Sunset Dome, and the farther point of your tour. The Sunset Dome is a beautiful space. I just had to stop and listen to the silence. Nothing but silence, running was from an underground steam, and the occasional drop of water from above (a cave kiss). If only the others on our tour would have been to appreciate it more. After the Sunset Dome you hit rewind and head back along the same path you just took on the way in. Back cross the suspended bridge. Then back to the bottom of the staircase....which you now need to walk up. And there are A LOT of stairs. It was tough, I'm not going to lie. I'm in pretty good shape and I had to stop twice on the way up. Once you're up to the top you have a chance to visit the gift shop again and purchase a souvenir or two. I don't recall our tour guide's name, but he was pretty good. He did spent a fair amount of time patting himself on the back, stating at least 4 times that how long he'd been doing these tours and how he considered himself an expert. Weird flex, but ok. It was still a good tour and I'm glad we were finally able to get to Hidden River Cave.

    Awesome tour!!! We had the pleasure of having Al (AL is his name...he's not AI lol) as our tour…read moreguide. Very informative and kept the group uplifted and enjoyable. I would definitely recommend this tour but be aware that there are MANY steps on this tour so wear comfortable shoes.

    Photos
    Hidden River Cave & American Cave Museum - Suspension bridge

    Suspension bridge

    Hidden River Cave & American Cave Museum - Cave Museum

    Cave Museum

    Hidden River Cave & American Cave Museum - Cave ceiling

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    Cave ceiling

    Diamond Caverns - Cave stuff 4

    Diamond Caverns

    4.2(77 reviews)
    4.6 mi

    Diamond Caverns is in the vicinity of Mammoth Cave NP. What sets this place apart is the amount of…read morediverse formations you get to see on a 1-hour tour. Also, unlike the national park, Diamond Caverns is first-come first-served with no reservations. I just visited the area for the second time, this time we had a lot of family members including small children. We did the early morning Mammoth Cave beginner-level tour and then went straight over to Diamond Caverns for their tour. Everything else in the national park was sold out for the day, but we went straight onto a Diamond Cavern tour with no wait and a group of 14 of us. The tour guide was very patient with the bunch of small children in our group. Overall, I highly recommend Diamond Caverns if you are in the area and interested in taking an hour-long tour that includes a lot of steps to get up and down to/from the caverns. There is some neat local history included as well. There's a full gift shop with beverages and restrooms available on site. No food, drinks, or bags of any kind are allowed in the caverns.

    My family planned months in advance to do a road trip and stay at Mammoth Cave NP. Unfortunately…read morethe federal government shut down just before we made our visit. When looking for things to do in lieu of MCNP we ended up at Diamond Caverns. It was ok. We'd been to Carlsbad Caverns recently so this was very underwhelming. 4 stars because the staff was great. The tour guide had her script nailed and she was passionate about working there. Large gift shop. My kids loved it and sometimes at the end of the day that's all that matters.

    Photos
    Diamond Caverns - Cave stuff 3

    Cave stuff 3

    Diamond Caverns - Inside the cavern.

    Inside the cavern.

    Diamond Caverns

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    Onyx Cave - landmarks - Updated May 2026

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