India, Feb. 16 -- Many of the great wonders of the world, from iconic buildings to national parks, are preserved and open to the public, but some are tucked away on private land where only a few can enjoy them. One such wonder-a natural spring-fed lake just an hour north of New Orleans-opened to the public for the first time last summer, giving Louisianans and visitors access to a surreal, bright-blue lake lined with white sand beaches.

The lake is part of the 422-acre Lake Isabel Farm in Bogalusa, Louisiana. What was once a gravel and sand mine is being reforested and turned into a sanctuary with quiet beaches and a pristine, spring water lake. Visitation is capped at 85 people per day, allowing each guest plenty of space to lounge on w...