Learn Spanish (Latin America): Hay madera buenísima en el aserradero que visitamos. - There is very good wood in the sawmill that we visited.

In Latin America, you can place recién right before a conjugated verb to mean "just." You could change the end of the sentence to ...el aserradero que recién visitamos (the sawmill we just visited). Notice that it pairs perfectly with the preterite verb visitamos!

How do we know if visitamos is in the present or past tense here?

For regular -ar and -ir verbs, the nosotros form is exactly the same in both the present and the preterite tense. You have to rely entirely on context. Without the English translation, this could technically mean "the sawmill that we visit (regularly)," but context usually makes it clear that it's a specific past event.

What is the difference between saying buenísima and muy buena?

Adding the suffix -ísimo/a to an adjective is a common way to say "extremely" or "super." While muy buena (very good) is completely correct, buenísima is more emphatic, natural, and expressive in everyday conversation. It means the wood is of exceptionally high quality.

Why isn't there an article before madera, like Hay la madera?