Seneca Lake, the largest of the group, is a short distance west of Cayuga, and its prolonged southern valley is bordered by ridges rising even higher, through which the streams have carved remarkable gorges. Two of the larger torrents coming into the prolonged Seneca Valley have hewn out of the hillsides, one on either hand, romantic fissures of wide renown,--the Havana and Watkins Glens. The Havana Glen is three miles south of the lake and about a mile long, being cut out of the eastern wall of the valley. The ravine is steep, having quite a large stream. Its characteristic is that the water and frost have made great fissures and caverns, but so fashioned them that all the joints and corners are right-angles. The cascades are successions of ledges, the water apparently running down a staircase. If the stream runs over a waterfall, it comes from a level ledge as if running over a wall. If it rushes through a gorge, all the corners are square, the sides perpendicular and the bottom level. If a brigade of stonemasons had built the place it could hardly have been more accurately constructed. Several of the cascades are magnificent, the "Bridal Veil" and the "Curtain Falls" going down a maze of rocky ledges, their frothy waters making resplendent sheets of exquisite lacework. In one place the stream flows through a perfectly square grotto known as the "Council Chamber," entering this great hall by a right-angled bend from an adjoining square-cut grotto of similar character. Each is a perfect apartment, the water rushing from one to the other through an entry-like passage, from which it makes a square turn. The glen is quite steep, and its "Central Gorge" is a narrow fissure, clean-cut and deep, making a half-dozen right-angled bends, each lower than the other, the torrent rushing around the sharp corners and over the straight edges with wild swiftness and clouds of spray. The visitor mounts ladders and steps through the spray, and the glen can be followed a long distance upward past many cascades, its picturesqueness being enhanced by the huge tree-trunks the torrent occasionally brings down and lodges in the many angular bends. [Illustration: _Watkins Glen_]