Rating: the rating goes from one to five stars. We tend to give higher rates to hikes that are unpopular rather than popular and offer unexpected sightseeing. We also tend to give a higher rating to hikes that include some challenging parts.
Vertigo: something we acknowledge when reading guidebooks is that the information of how a track is dangerous is often missing. Of course, we are talking about trekking, not hiking.
Ground: dividing the proportions between forest, grass, rock and urban is not an easy thing to do, so we roughly estimate those proportions.
GPS related: provided by (more and less sophisticated) GPS tools.
Notes:
Technical level
Easy walk, literally for everyone.
Easy path, never requires you to use extra tools or your hands. For (almost) everyone.
Relatively easy path, you might be required to use your hands. For trained hikers.
You are required, in some parts, to use your hands. For adventure hikers.
There are some portion of the track where you must use your hands and there is a fixed rope to help you (e.g. Via Ferrata). For experienced hikers.
Some parts of the track requires you to climb on a very basic level. For expert hikers.
Tools
Climbing helmet is strongly recommended.
Any pair of shoes can be used (except slippers).
Hiking shoes protecting your ankles are recommended.
Mountaineering boots are recommended.
Extra
Presence of cable car as part of the hike.
Gravel that might require extra awareness.
Do not forget a map at home.
The track can be done by bike.
The track can be done by runners.
The track can be done with a stroller.
A dog can follow you along the track.
The track is also suggested during the Winter with snowshoes.