World's Most Secret Homes

A look at a Norwegian mountain cabin accessed by helicopter in winter, a California family retreat embedded into its rocky surroundings, a concealed jungle lodge high in the mountains of Brazil, and more.

Uncovering a 300-year-old Scottish ruin that's been brought back to life by an owner, who had the ingenious insight to build a unique modern home within its crumbling walls.

We explore a sprawling grid-shaped family residence hidden in nature, then a tastefully transformed wartime bunker on the Isle of Wight, and finally an ultramodern house in San Francisco.

Exploring a modern home commissioned by Lord Rothschild in Buckinghamshire, England, built out of flint, a glass residence nestled next to a scenic lake in Switzerland and a treehouse that serves as a dream getaway for a family of five in New York.

From extravagant underground bunkers to cabins on remote islands, homeowners discuss what attracted them to such unusual and secluded properties.

A look at an enchanting villa in the Spanish countryside, an ultra modern cliff-side retreat in the wilds of Switzerland, a cabin that resembles a pair of binoculars perched on a cliff in rural Quebec, and a woodland retreat in Portugal.