Old Faithful Geyser of California

CALISTOGA. While not the Old Faithful that you've read about in "National Geographic," this California geyser manages to blow off steam almost as regularly as its more famous Yellowstone cousin. The water, which reaches a temperature of 350°, soars nearly 60 feet into the air, creating an eerie mist in the morning and beautiful rainbows when the sun is in just the right position – all to the delight of more than 150,000 annual visitors.