Handpicked experience · Guilin
Guilin, China
Show caves where Tang-dynasty visitors left ink on the walls in 792, lit in colours chosen in the twentieth century.
A private guide and vehicle working at your pace
Lit, maintained paths with viewpoints set up for photographs
One or two caves, or a nearby scenic stop instead
Hotel pickup or a central meeting point as you prefer
A constant underground temperature whatever the season
Six hours spent under the karst around Guilin, in a landscape that is as hollow below ground as it is vertical above it.
Lit, paved paths through large chambers, with handrails and steps rather than any scrambling. Because the tour is private you can spend twenty minutes in one chamber and walk briskly through the next, and add a scenic stop nearby if the caves take less time than expected. Underground it stays around twenty degrees all year, which is a mercy in August and warmer than the street in January.
The most famous of these caves has more than seventy inscriptions written in ink on its walls, and the earliest date from the Tang dynasty — the oldest around 792. They are not sacred texts. They are travellers' notes: names, dates, lines of poetry, the occasional complaint. People were making a day trip to look at rock formations and writing on the wall about it twelve hundred years ago, which puts your own photographs in perspective.
Rain picks up carbon dioxide from the air and soil and turns mildly acidic, and mildly acidic water dissolves limestone. That is the entire mechanism. Underground it hollows out chambers; where the roof collapses and the rock erodes from outside, it leaves the isolated towers standing over Guilin. Inside, the process reverses at the drip: as water loses its carbon dioxide it drops the dissolved lime again, a fraction of a millimetre a year. A stalactite the length of your arm is older than agriculture.
The formations are natural; the lighting is not. The coloured floodlights date from the mid-twentieth century and are a deliberate presentation choice rather than anything geological, so what you photograph is a designed effect laid over a real one. Look past the palette and you can see the actual rock, which is white, grey and translucent amber.
Around the fixtures you will notice a green film on the stone. It is lampenflora — algae and moss that colonise cave surfaces wherever artificial light reaches, growing on rock that had no light at all for millions of years. It has to be scrubbed off periodically, and it is the clearest sign of what opening a cave to visitors actually does to it.
Nothing at the ticket windows is prepaid, so carry local currency. Paths are damp and can be slippery, and there are steps throughout; wear shoes with grip. Humidity underground is very high, so a camera brought in from a cold vehicle will fog for the first few minutes.
Open it to pick a date and work out the price.
What the fare covers, and what to budget for separately.
The practical detail, and the answers people actually ask for.
The earliest date from around 792, in the Tang dynasty. They are travellers' notes — names, dates, poetry — written by people making the same day trip you are.
No. The formations are, the lighting is not. Coloured floodlights were installed in the mid-twentieth century as a presentation choice; the rock beneath is white, grey and translucent amber.
A fraction of a millimetre a year. A stalactite the length of your arm has been forming since before agriculture.
One process. Slightly acidic rainwater dissolves limestone: underground it hollows chambers, outside it leaves the isolated towers standing over the city.
Lampenflora — algae and moss growing on rock that had no light for millions of years until the lamps arrived. It is cleaned off periodically.
Around twenty degrees year-round, so it is cooler than a Guilin summer and warmer than a Guilin winter. A light layer is enough.
No scrambling — paved paths, handrails and steps throughout. The surfaces are damp, so shoes with grip matter more than fitness.
No, admission is arranged separately. Carry local currency for the caves you decide to visit on the day.