A third type of mountain may be formed as a result of volcanic activity which occurs in regions of active fold mountain belts, such as in the Cascade Range of western North America.

第三种类型的山可能是由于火山活动形成的，一般发生在活动性褶皱带地区，如北美西部的喀斯喀特山脉。

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Dine on refined, rustic cuisine such as sustainable seafood and organic root vegetables while soaking in the striking views of the entire Cascade mountain range.

BBC: Daily deal: Oregon golf resort with Cascade Mountain views

After taking in the panoramic views of the Cascade Mountain range and downtown Portland, head back down via the Marquam Trail, following the 4T signs to the Portland Aerial tram, where futuristic pods offer a birds-eye view of the city while transporting you 3, 300ft in three minutes, depositing you at Southwest Waterfront Street directly across from the Portland Streetcar, which will take you back downtown.

BBC: Portland's urban adventures