The descent, from the top down.

You meet near Šavnik, get fitted with a wetsuit, harness and helmet, and walk in. The approach is on a path through beech woods above the river, and it is where the briefing happens — signals, what to do at a drop, what to do if you come off your feet in moving water. Walking time in is about 10 minutes, and we meet at Eco Village Jatak at 09:00.

The first pool is the moment people decide they are fine. The water is cold enough to take your breath for a few seconds and then the wetsuit does its job. Water temperature runs 5–12 °C. From here on you are wet for the rest of the day, and the group moves as one line with a guide at the front.

This is the part Nevidio is named for. The walls come together overhead until the sky is a bright seam, the light goes green and grey, and you swim rather than walk. Nothing technical happens here — it is just the reason people come. At its narrowest the canyon is 25 cm across.

Where the river drops over rock it has polished smooth, you slide it. Your guide goes first, checks the landing, and tells you exactly how to sit and where to put your arms. There are numerous slides.

The drops that cannot be climbed or slid are abseiled on rope. You do not need to know how — you are shown at the first one, clipped in by a guide, and lowered or you walk yourself down, whichever suits you. The guide rigs and de-rigs every drop and is the last one down.

Where the pool below is deep enough and has been checked, you can jump — up to 10 m.

Every jump can be bypassed. There is an alternative path around each one. If you already know you do not want to jump, say so on the booking form — it is a completely normal request and it changes nothing about your day.

The descent ends downstream and you walk out from there, back to the meeting point to change. Total distance covered on the day is about 2.7 km, of which 1.6 km is the descent itself.