Geography of the European Netherlands European part of the country can be split into two areas: the low and flat lands in the west and north, and the higher lands with minor hills in the east and south. The former, including the reclaimed polders and river deltas, make up about half of its surface area and are less than above sea level, much of it actually below sea level. An extensive range of seawalls and coastal dunes protect the Netherlands from the sea, and levees and dikes along the rivers protect against river flooding. The rest of the country is mostly flat; only in the
Voyage to the Bottom of the Sea (TV series) Voyage to the Bottom of the Sea (TV series) Voyage to the Bottom of the Sea is an American science fiction television series based on the 1961 film of the same name. Both were created by Irwin Allen, which enabled the movie's sets, costumes, props, special effects models, and sometimes footage, to be used in the production of the television series. "Voyage to the Bottom of the Sea" was the first of Irwin Allen's four science fiction television series, and the longest-running. The show's theme was underwater adventure. "Voyage" was broadcast on ABC from September 14, 1964, to March 31,