La Fortuna is a rural city located in San Carlos, in the province of Alajuela, Costa Rica. La Fortuna has the airport which is nearest to the Arenal Volcano, though many visitors also arrive via automobile, to the resorts and hotels in La Fortuna, Castillo, Palma, Monteverde, or Tilaran. Arenal is often cited by scientists as being in the top ten or top 20 of the world’s most active volcanoes.