Officials at Puerto Rico’s popular El Yunque tropical rain forest have unveiled its first ever trolley system.

The $2.3 million system features three trolleys with a capacity of 66 passengers that will guide tourists from Yokahu Tower to the path that leads to Mt. Britton.

Puerto Rico Resident Commissioner Pedro Pierluisi says tours will begin July 3 and are free for two years.

He said Friday that the municipality of Rio Grande will pick up the $75,000 annual tab to operate the U.S.-funded trolley system.

El Yunque is the only tropical rain forest within the U.S. forest system.

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Photo Credit: El Yunque rainforest. Chris Amelung / Flickr