The users of this website have accumulated quite a few travel logs, or travel diaries, which provide personal accounts of their stay in Latin America or other Spanish speaking travel destinations.
These are the same as the relative pronouns, only they are written with an accent:
¿Quién,-es? (who, whom?)
¿Cuál,-es? (which?)
¿Qué? (what?)
¿Cúyo,-a,-os,-as? (whose?)
¿De quién,-es[1]? (whose?)
¿Cuánto,-a,-os,-as? (how much, how many?)
Cuál when interrogative is used without the definite article which must accompany it when it is a relative pronoun. Quién, interrogative, is never an adjective.