Irazú Volcano

At 3,432 meters, Irazú is Costa Rica's highest volcano — and, unlike Poás or Arenal, the country's most accessible one: a paved road climbs almost to the crater's edge, so the summit costs you a drive, not a hike. What waits at the top is a landscape that belongs nowhere else in the Central Valley: a gray, wind-scraped ash plain above the treeline, cratered like a smaller moon, where the temperature sits near 5 to 10°C even at midday. Bring a jacket you'd otherwise leave at home.

The main crater holds Diego de la Haya, a lake whose color shifts with the season — sometimes a mineral emerald green, sometimes rust red, occasionally reduced to a dry, cracked basin when the rains fall short. Arrive early: cloud cover builds fast, and only the first clear hours give you the volcano's signature view, both the Pacific and the Caribbean visible at once from a single point. Coming down, the colonial rooftops of Cartago and the coffee terraces of the Orosi Valley make an easy, unhurried second act.