Awesome tour - Awesome tour with Ernie. Booked the small group option with skip the line option and wasn’t disappointed. Ernie’s friendly nature and fun facts about the caves & castle made a very enjoyable day.

Discover Slovenia excursion in a short time! - Our guide Ernest was the best, described everything on our way to the caves and castle. Slovenia is beautiful and well worth the short jaunt from Trieste. He made sure we got back in time to board our ship at 2:00 pm. Dropped us off at the port. Met at the hotel across from the port. Made it easy to pick up tour and depart on time. My PSA: Please tip your guides as you would a restaurant server. Enjoy

Excellent way to see Predjama and Postojna - I enjoyed my trip to Predjama castle and Postojna caves. Our driver was very helpful and told us about the surrounding area. The castle was amazing and the caves blew my mind. Worth taking this trip and having it all planned for you.

Great Day at Castle & Cave - Our group of 4 had a great day with Boris. Boris picked us up at our Trieste hotel and made sure we were dressed appropriately (castle is chilly!) and were on time. Boris also made a great recommendation for Solvanian dessert. The castle and cave were both amazing and highly recommended.

Wonderful tour for either rain or shine! - The weather was not cooperating the day we went on this tour but that did not impact our incredible experience. The castle was quite impressive and the caves were spectacular! The tour was very well organized and seamless. Special thanks to our driver Boris for his kindness! I highly recommend this tour!

Caves spectacular… pic up... - Caves spectacular… pic up and drop off right on time……..castle good audio system …. Pleasant experience……would recommend 👍🏻

Breath taking Caves - Simple tour, well organised. We were sent an email il with a centralised meeting point and time the night before, very simple. The driver took us to each locations, purchased the respective tickets for us. At each location he explained the entry process and a time and meeting point for departure that gave us ample time to visit the attractions and then browse the area or enjoy some light refreshments.

Great trip - Could have used more time at the castle. It was very rushed with no time to enjoy the site. The caves were incredible

Enjoyed seeing the... - Enjoyed seeing the castle’s architecture & learning its history. The cave exploration had a cool train ride through a narrow tunnel into the cave interior. Felt that interior lighting could have been better.

KOPER TRIPS "Small Group Tours" are a SCAM - KOPER TRIPS who provided this tour are DISHONEST and UNTRUSTWORTHY and are SCAMMING customers by charging for Small Group Tours which they don't operate. Lots of companies provide tours to the beautiful Postojna Caves so we suggest you try someone else who won't rip you off and then lie about it to TripAdvisor. We purchased a higher-priced Small Group Tour to the Postojna Caves which was advertised as having a maximum of 15 people. On the day, we were forced to take a coach with around 40 other people, by a very grumpy man who just kept telling us we were wrong even though we had the Small Group Tour order and receipt in our hands to prove it. We also found out there were several other people on the same bus who had purchased the higher-priced Small Group Tour but we're made to join in with the large, cheaper tour or miss out entirely. We later requested a partial refund from TripAdvisor, as whilst we reluctantly went on the large group tour (it was our last day in Trieste so had no other option to get to Postojna) we felt a partial refund was fair considering we paid extra for a Small Group. TripAdvisor refused to provide anything, saying the tour operator told them they had told us the day before the tour that the small group tour was not on. This is completely untrue as we never received any such notification. We asked TripAdvisor for proof from the tour operator that they did contact us, but they never replied. Disappointing service from TripAdvisor and complete lies from KOPER TRIPS.