Breakdown of A lo mejor han enterrado plata en este bosque.
en
in / on / by (means of transport) / about (after pensar)
el bosque
the forest
este
this (m.sg., also esta, estos, estas, esto)
haber
to have (auxiliary)
Questions & Answers about A lo mejor han enterrado plata en este bosque.
Why is han enterrado in the indicative instead of the subjunctive, since "maybe" expresses doubt?
Even though a lo mejor expresses doubt or probability, it is a special phrase that almost always triggers the indicative mood. Other words for "maybe" like quizás or tal vez often take the subjunctive, but with a lo mejor you just use normal indicative tenses like the present perfect (han enterrado).
Could I use igual instead of a lo mejor in this sentence?
Yes! In Spain, igual is very commonly used in everyday speech to mean "maybe" or "perhaps." Just like a lo mejor, it takes the indicative. You could say Igual han enterrado plata en este bosque and it would mean exactly the same thing.
Who is "they" in han enterrado? Is the speaker talking about specific people?
Does plata mean "money" or the actual metal "silver" here?