If you know what’s good for you, you’ll take a hike. And you’ll take it at one of these extraordinary sites currently making news.

ST. THOMAS: A glorious new nature trail now winds above Magens Bay on this tropical isle. It’s a moderately strenuous, 60- to 90-minute downhill (yes!) walk that winds through dense trees and vegetation to the bay’s sandy shores. The Nature Conservancy, which built the trail, recommends you take the walk with a tour guide. Call Virgin Island Ecotours at (340) 776-4760.

SEQUOIA NATIONAL PARK, CALIFORNIA: The palatial California park with the massive trees has just opened the Giant Forest Museum, a rustic exhibit center that occupies an historic building made of timber, and which forms a hub for a series of interconnected hiking trails. Inside the museum, you’ll learn about the ecology of the ancient timbers. Outside, you’ll experience their grandeur firsthand. (559) 565-3341, www.visitsequoia.com

MENDOCINO COAST, CALIFORNIA: Northern California has a new state park — Big River State Park, a stunning expanse of land on the Mendocino Coast. Established on property once owned by a logging company, the park covers more than 50 miles of the Big River and its tributaries, and includes more than 100 miles of trails and 60,000 acres of wildlife corridors. www.mendocinolandtrust.org