Hotel Bel-Air

Tucked into a wooded canyon with its own swan lake, Hotel Bel-Air is the most secluded and romantic of LA's grand hotels — a Dorchester Collection hideaway where privacy is the entire point. The Spa by La Prairie continues the spell with a dry sauna and steam room set in a serene, garden-wrapped thermal suite that feels a million miles from the city. This is sweating as part of a slow, indulgent retreat rather than a quick gym add-on. The bungalows and suites are dreamy, all fireplaces and private patios among the greenery. It's expensive and gloriously low-key — no scene, no noise, just calm. For a heat session as part of a genuine hideaway, few places in the city compete. Spa access usually requires a booking or treatment, so arrange it ahead and surrender the afternoon.