This morning we recommend self-driving to the entrance to Arenal National Park for a 3-mile (5-km) self-guided walk along one of the trails around the base of the volcano.
Arenal Volcano rises to 5,250 ft (1,600 m) and towers over the village of La Fortuna. On the morning of 29 July 1968, after having been inactive for three thousand years, it erupted in the most spectacular way. The earth started shaking, clouds of ashes rose into the sky, women washing clothes by the river felt the water becoming hot, and lava started pouring down the side of the volcano.
You can walk along one of the trails through the rainforest, where you can see large lumps of sandy lava rock and view the many plants now growing here, as the rainforest has recovered. At the top of the trail, on a clear day you will have beautiful views over Lake Arenal. There is also a deck at the end of the trail, with postcard views of the volcano.
The afternoon is at leisure to relax at your lodge or explore the town. There is also the option of driving to La Fortuna Waterfall, which plunges down nearly 250 ft (75-m) from a cliff outside the town. Surrounded by lush foliage, the climb down to the waterfall is tough (500 steps) but the view once you get there will be worth the effort. At the bottom there is the opportunity to swim in the cold waters of the surge pool and shallow river at the bottom (pay entrance fee locally).
Note: Wear comfortable walking shoes and bring binoculars & rain gear. Also sun hat, sunscreen and insect repellent. Bring swimwear, towel and water shoes for the waterfall climb, which is not suitable for anyone with mobility issues.