The seaward flanking ranges run up to 4000 ft.
The fortifications of the citadel have an elaborate double gate with flanking towers.
On the north side the Ring-Strasse gives place to the spacious Franz Josef's quay, flanking the Danube Canal.
Next may be named the Ala-tau, on the prolongation of the Tian-shan, flanking the Syr on the north, and rising to 14,000 or 15,000 ft.
The low ground between the slight hills flanking the Thames valley, and therefore mainly south of the present river, was originally occupied by a shallow lagoon of estuarine character, tidal, and interspersed with marshy tracts and certain islets of relatively firm land.
