Arenal Observatory Lodge

Arenal Observatory Lodge and Trails holds the distinction of being the closest hotel accommodation to Arenal Volcano in Alajuela Province, Costa Rica, and the only lodging property situated within Arenal Volcano National Park boundaries. The property began as a scientific research station for the Smithsonian Institution in 1987, established specifically to monitor one of the most consistently active volcanoes in the Americas during its eruptive cycle, which ran from 1968 until the volcano entered a resting phase around 2010.

The lodge sits on a private reserve of approximately 870 acres, with 12 kilometres of maintained trails traversing primary cloud forest, old lava fields, and the Río Agua Caliente valley below. The trail network connects directly to the national park's official paths, giving guests immediate access to volcanic terrain without any additional transport. The original Smithsonian Observatory building remains standing on the property and serves as a historical reference point and viewing structure for guests.

Accommodation ranges from standard rooms and junior suites to the White Hawk Villa, the lodge's most expansive option featuring panoramic volcano framing from the terrace. All rooms include private balconies or terraces oriented specifically toward Arenal Volcano, and several room categories feature soaking tubs or hot tubs with direct lines of sight toward the crater. The interior décor uses local hardwoods, stone, and rough-hewn timber with a deliberately rustic-natural aesthetic that prioritises connection to the surrounding environment.

The main restaurant serves Costa Rican and international cuisine across breakfast, lunch, and dinner seatings. Buffet-style breakfasts are included with most room rates and are consistently praised for variety and quality. A full bar at the restaurant provides a relaxed gathering space for guests returning from evening trail excursions.

A private thermal spring pool — fed by volcanic geothermal water — is a major draw, offering a more intimate hot spring experience compared to the larger commercial operations in La Fortuna town. A natural cold-water swimming lake and an on-property waterfall provide refreshing counterparts to the thermal pool. A small spa facility offers massage and basic treatments.