The Geysers is the largest geothermal energy complex in the world, generating 850 megawatts of clean, renewable energy. Check out operator Calpine's visitor center in Middletown, which runs occasional tours to the nearby facilities.
Calpine Geothermal Visitor Center
Lonely Planet's must-see attractions
21.62 MILES
At the valley’s westernmost edge, where sloping vineyards meet wooded hillsides, Tres Sabores is a portal to old Napa – no fancy tasting room, no snobbery…
22.92 MILES
A cult favorite, supercool Kaz is about blends: whatever is in the organic vineyards goes into the wine – and they’re blended at crush, not during…
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18.9 MILES
For its creamy and crisp chardonnays and earthy pinots, along with top-notch service and an elegant tasting room, Macrostie is the talk of Wine Country…
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26.9 MILES
The fabulous hillside tasting room, constructed of stone, redwood and teak, resembles a small cathedral – fitting, given the sacred status here bestowed…
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22.15 MILES
Meandering paths wind through magical gardens and fruit-bearing orchards surrounding an 1884 barn and farmstead with cats and chickens. The vibe is casual…
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26.11 MILES
Prepare to gawk and giggle at the wacky Patrick Amiot sculptures gracing front yards along Florence Ave. Fashioned from recycled materials, a hot-rodding…
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21.69 MILES
If you visit one boutique winery in Lake County make it Olof Cellars. The wines are excellent – most are reds aged for a minimum of three years – and the…
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Jack London State Historic Park
27.05 MILES
Napa has Robert Louis Stevenson, but Sonoma has Jack London. This 1400-acre park frames that author's last years; don't miss the excellent on-site museum…
Nearby attractions
5.11 MILES
This winery has a stunning location on a hilltop overlooking the lake with picnic tables available for anyone who wants to pack a lunch. Visitors can opt…
2. Robert Louis Stevenson State Park
6.08 MILES
At this undeveloped state park 8 miles north of Calistoga, the long-extinct volcanic cone of Mt St Helena marks Napa Valley’s end. It's a strenuous 5-mile…
10.22 MILES
The tasting room is a garage, where you may even meet Mr Arroyo, known for his all-estate-grown Petite Sirah and Cabernet Sauvignon. They're distributed…
10.27 MILES
Calistoga’s miniversion of Yellowstone’s Old Faithful shoots boiling water 30ft to 80ft into the air, every 10 to 20 minutes. The vibe is pure roadside…
10.62 MILES
Abutting oak-studded hills, Hanna’s tasting room has lovely vineyard views and good picnicking. At the bar, find estate-grown Sauvignon Blanc, Malbec,…
11.19 MILES
Come to Soda Rock to behold Lord Snort, a 20,000lb metal boar sculpture displayed out front, and stay for the big Bordeaux varietals, including Cabernet…
11.6 MILES
Hawkes makes an easy stopover while you’re exploring the valley, and offers private barrel tastings in which guests sample straight from the oak and order…
11.67 MILES
In downtown Calistoga, this tasting room run by a long-time winemaker specializes in extremely small-production wines produced with wild yeast. The big…