Otter Mound Preserve is a 2.45-acre natural area located at 1831 Addison Court on Marco Island, Florida. This preserve is notable for its rich history, diverse plant life, and unique archaeological features.

Historical Significance: The preserve is situated atop a shell mound, or midden, constructed by the Calusa Native Americans between 700 AD and 1200 AD. These indigenous people created the mound using shells from oysters, southern surf clams, lightning whelks, and other shellfish species. In the 1940s, Ernest Otter, a settler after whom the preserve is named, built his home on this site and used the shells to create distinctive whelk shell terraces that remain a highlight of the preserve today. 

Natural Features: The preserve is characterized by a tropical hardwood hammock ecosystem, featuring large gumbo limbo trees, strangler figs, and yellow elders. It supports a variety of wildlife, including over 57 species of birds and 127 species of plants. Visitors might also encounter gopher tortoises, Virginia opossums, gray squirrels, raccoons, and occasionally bobcats.

Visitor Information: Otter Mound Preserve offers a mulched trail that loops through the area, providing a shaded and serene walking experience. Along the trail, benches are available for rest, and interpretive signs offer insights into the preserve's ecological and historical aspects. Tips for Visitors:

Mosquitoes: Be prepared for mosquitoes, especially during the wet season; consider bringing insect repellent.

Amenities: There are no restroom facilities or drinking water available on-site.

Accessibility: The trail is not currently wheelchair accessible.