Amber is formed from the resin of trees that became fossilized between 25 and 40 million years ago, covering and preserving whatever lay in its path, from insects to leaves and even small animals. Situated in a beautifully restored Victorian mansion, the Amber Museum has many excellent examples of the naturally formed stone. One of the most popular items on display is a 16-inch-long (40-centimeter-long) lizard, perfectly preserved in clear resin.
Information panels explain in both English and Spanish how the gemstone is formed and share the history of the family who owned the house. Many Puerto Plata tours include a visit to the museum in addition to such popular attractions as Fortaleza San Felipe and the cable car on Mt. Isabel de Torres.