Rainforest Adventures and its aerial tram allow you to visit the heights of the forest canopy in a gondola. The 2.6km ride takes roughly two hours, affording unusual plant-spotting and birdwatching opportunities. The fee includes a guide, which is helpful since the density of the vegetation can make observing animals difficult. Book online or in the San José office.
Ziplining is also available: you can ride 11 cables, the longest 700m. Minimum age is six years. Full-day combo tours include visit to butterfly garden, guided walk, and visiting a hanging bridge.