Detail of the ruins of San Francisco's Sutro Baths at Lands End.

A crumbling wall at the Sutro Baths ruins at San Francisco's Lands End.

The ruins of San Francisco’s Sutro Baths, once the world’s largest indoor swimming pool, lie along the beach at Lands End.

Detail of the ruins of Sutro Baths at San Francisco's Lands End.

A staircase leads up a rock at the Sutro Baths ruins in San Francisco.

Rocks greet the Pacific Ocean near San Francisco's Sutro Baths ruins at Lands End.

A rock wall—part of the ruins of the Sutro Baths—leads towards the modern wing of the historic Cliff House restaurant on the beach at Lands End, San Francisco.

Part of the ruins of San Francisco's Sutro Baths sit perched above the roiling waves of the Pacific Ocean at Lands End.

A ship sails towards San Francisco Bay, past the rocky shore at Lands End.

A fisherman tries his luck as the sun sets on the Pacific Ocean at San Francisco's Lands End.