Lakeview, OR

The geyser “Old Perpetual” sits atop a geothermal basin in southern Oregon.

It’s just off a main highway, erupts every 90 seconds — ideal for a tourist attraction — and has done so since 1923, when it was accidentally created by well-diggers drilling a hot water pipe for a nearby lodge.

Old Perpetual's hot water source has been threatened by a proposed geothermal electric power plant rumored to be going in next door, but to date there is no power plant and the geyser continues to vent,