Consider coming at 9 when they open or in the afternoon as it was very crowded at 1015 (which they also mention online). We were in line for almost an hour lbefore we got in, You walk and see the gorge, river and waterfalls. It was very crowded and you walk closely together The nature was astonishing but the cry had

Awesome place to visit, went there with small children and the whole family enjoyed it. Be there early in the morning to avoid the crowd. We have arrived there around 9h15 and could access the nearest parking lot. When we left, around 11h30, there was more and more people coming in, a long wait in front of the entry and all parking lots were full. The road between the parking lot P5 and the P1 is tight and there is no sideway for pedestrians, so I strongly recommend going there early to enjoy the place without any issue.

The gorge is definitely something to see. Considering the location there is enough parking space (free), unlike some other locations you have a free and more important clean toilets at the parking lot. It is well organised (the entry, ticket purchasing, the path itself). The problem is that it's overcrowded but that is probably the month of the year... You have to prepare yourself for standing in the line for 20-30 minutes, and also to walk the entire path with many tourists arround you. There's also a couple of restorants at the entrance, big enough to have available table even on a crowded day.

We visited Liechtensteinklamm (gorge) August 2023, but went on a Thursday since we knew weekends would always be more crowded. It's near the town of St. Johann and is said to be one of the deepest and longest in Austria. We tried to heed the common advice of avoiding crowds at popular attractions by going before 11 or after 3, and we arrived around 10:30am. There was already a line of about 25 people and, for crowd-management, they only let a certain number of people in at the same time. While one of us waited in line, the other bought tickets. The gorge is named after the Prince of Liechtenstein, who kindly footed the bill in 1875 to have it made accessible to the public. The first part of the walk looks down on the river with several tunnels and galleries blasted into the walls. Then you descend right down to the river. The original way down was damaged by landslides in 2017 and in 2020 a remarkable spiral staircase was built in its place. 3 new tunnels were also added. A tourist brochure comforts visitors by saying that loose rocks are cleared away several times a year, and earth movements are carefully monitored. Once down the spiral staircase you are walking in galleries right above the water, which was cloudy and tumultuous on our visit, possibly due to recent rain. You can also see the striking veins of the rocks (white limestone and black shale). We had sunshine that day and at one point where the walls widened we had a nice rainbow. Noon, with the sun directly overhead, provides the best light. Other times the walls almost touched and the tunnels were quite dark. This was the one gorge walk where we wished we had brought a flashlight. Liechtensteinklamm is about 980’ deep (300m) and it takes 440 steps to get down to the river. Although the gorge is 4km long, you can only explore 1.5 km of it, so it’s not a long walk. The brochure recommends allowing 1.5 hours total. At the end, the gorge opens up and there is a viewing platform of a tall waterfall. You return the same route. When we got back up to the entrance (around noon) we were shocked at how long the line was to get in! Easily 100 people. St. Johann is not especially close to any major city, so we blamed the crowd on the many tour buses that had arrived. Of course, tour buses are the main reason it’s always suggested to avoid 11am-3pm. But, rather than inconvenience visitors who went out of their way to be there, we wish they’d cut down on the number of buses they allow instead, many of which brought visitors who didn’t even know why they were there (based on comments overheard). But, of course, money talks.