Section of the Big Tree, 30 feet in diameter, and House over the Stump, from the Sentinels.

Section of the Big Tree, 30 feet in diameter, and House over the Stump, from the Sentinels.

Section of the Big Tree, 30 feet in diameter, and House over the Stump, from the Sentinels.

Section of the Big Tree, 30 feet in diameter, and House over the Stump, from the Sentinels.

Section of the Big Tree, 30 feet in diameter, and House over the Stump, from the Sentinels.

The Sentinels, 315 feet high, near view - Section of the Big Tree and House over the Stump.

The Sentinels, 315 feet high, near view - Section of the Big Tree and House over the Stump.

Two Sentinels, 312 ft. high, 69 ft. in in circumference. Mammoth Tree Grove, Calaveras County, California.