Jameos del Agua and Cueva de los Verdes: two halves of one lava tube

What people mean when they search for Lanzarote volcano lava is usually the black fields in the south. The caves are the same material seen from the inside, and the mechanism behind them is simple enough to explain in a sentence. A flow moving downhill loses heat at its surface first. The outside stiffens into a crust while the middle stays hot and keeps moving, and when the supply finally stops, that hot middle drains onwards and leaves a hollow behind. That hollow is the lava tube, and on this island one of them runs for a long way underground in the north.

Two sections, two treatments. At Cueva de los Verdes you go inside and walk. The route follows the passage, the lighting picks out the walls, and the interest is structural: the levels, the narrowing, the ceiling, the marks left by the rock that used to flow where you are standing. At Jameos del Agua the ceiling of the same kind of passage has fallen in, so a stretch of it is open to the sky. That opening has been landscaped — gardens, water, white walls, steps down into it — and the visit is as much about the design as about the geology.

Which is which, in one line. Cueva de los Verdes is a cave visit. Jameos del Agua is a place built into a cave. People who want the rock prefer the first. People who want somewhere to sit with a coffee and look at water in a volcanic setting prefer the second. Both are on the same tube, within a short drive of each other.

Why it is a long day. Both sit in the north; Timanfaya is in the south. Any listing that names the park and a cave in the same title is therefore selling you a crossing of the island and back, and that is exactly why $102 runs nine hours and $100 eight. The hours are not padding: they are the map.

The one that names everything. $102 is nine hours and takes in Timanfaya, Jameos del Agua and Cueva de los Verdes. Rated 4.5 across 2,845 reviews. It is the only listing on this site that puts all three in one title, and if the caves are the reason you are booking at all, this removes the problem of fitting them in around a park day.

The eight-hour pairing. $100 covers the park and Jameos del Agua, rated 4.5 across 2,050 reviews. What it gives up is the underground walk; what it buys back is an hour of your day and a gentler pace. For a lot of people the roofless section is the one they actually wanted to see, and this is the cleaner way to get it.

The island day. $58 is nine hours across the highlights of Lanzarote, rated 4.7 across 3,303 reviews — the best-rated full day on this site and the most reviewed of the three. It covers a wider sweep of the island. Read its own itinerary on the listing to see which stops are included on the date you want, because a highlights route is built around a list that each operator sets for itself.

And the park on its own. If the caves are optional, $68 at five hours and $68 at six keep the day shorter and stay in the south. Neither names a cave, and we would rather say that plainly than let a title do the implying.

For both caves and the park, book $102. Nine hours covering Timanfaya, Jameos del Agua and Cueva de los Verdes, rated 4.5 across 2,845 reviews.

For the park and the roofless section, book $100. Eight hours, rated 4.5 across 2,050 reviews, and an hour shorter than the full version.

For the widest sweep of the island, book $58. Nine hours, rated 4.7 across 3,303 reviews — the best-rated full day here, with the itinerary printed on its own listing.

If the caves can wait, book $68. Five hours concentrating on the park, rated 4.4 across 2,785 reviews, and your afternoon stays yours.

And for the volcanic ground under your own steering, book $172. Two to three guided off-road hours, rated 4.7 across 5,513 reviews — a different day entirely, and the most reviewed listing on this site.