Colombia's marine treasures are often overlooked in favor of the colorful towns that dot its mountainous coffee region. But just below the waves, a vibrant undersea world with over a thousand square kilometres of coral reef awaits those who take the plunge.

Yet this improbable marine wonder is in danger. Scientists, local experts, passionate activists, and islanders are sounding the alarm about the deterioration of one of the richest ecosystems in the Caribbean Sea, even as they work together on innovative ways to restore it.

The One Million Coral for Colombia project initiated by the Colombian Government in 2021 aims to plant one million coral fragments and restore 200 hectares of coral reef by 2023.