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A sea is a large body of salt water that is surrounded in whole or in part by land. More broadly, "the sea" is the interconnected system of Earth's salty, oceanic waters—considered as one global ocean or as several principal oceanic divisions. The sea moderates Earth's climate and has important roles in the water cycle, carbon cycle, and nitrogen cycle. Although the sea has been traveled and explored since prehistory, the modern scientific study of the sea—oceanography—dates broadly to the British Challenger expedition of the 1870s. The sea is conventionally divided into up to five large oceanic sections—including the International Hydrographic Organization's four named oceans (the Atlantic, Pacific, Indian, and Arctic) and the Southern Ocean; smaller, second-order sections, such as the Mediterranean, are known as seas. Owing to the present state of continental drift, the Northern Hemisphere is now fairly equally divided between land and sea (a ratio of about 2:3) but the South is overwhelmingly oceanic (1:4.7). Salinity in the open ocean is generally in a narrow band around 3.5% by mass, although this can vary in more landlocked waters, near the mouths of large rivers, or at great depths. About 85% of the solids in the open sea are sodium chloride. Deep-sea currents are produced by differences in salinity and temperature. Surface currents are formed by the friction of waves produced by the wind and by tides, the changes in local sea level produced by the gravity of the Moon and Sun.
Lake Łebsko. - In the Słowiński National Park in Kluki. The horizon is beyond the sea. I was there in June. The p
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Lake Łebsko.

Added yesterday by Zeta

22

Great Barrier Reef. - Great Barrier Reef in Australia.
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Great Barrier Reef.

Added 4 days ago by Zeta

110 1

Sunset. - Sunset in the tropics.
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Sunset.

Added 4 days ago by Zeta

59

Lago di Braies. Italy. - Well, these are not stairs to heaven ...
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Lago di Braies. Italy.

Added 5 days ago by Zeta

42

Beach in Bali. - Beautiful beach in Bali ...
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Beach in Bali.

Added 6 days ago by Grażyna

32

A beautiful holiday - Holidays in a nice and warm place
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A beautiful holiday

Added 10 days ago by Hhh

43 2

nature itself - same nature ---- maki, maki
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nature itself

Added 10 days ago by Basiunia

69

Angry sea. - 10 on the Beaufort scale !!!
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Angry sea.

Added 11 days ago by Grażyna

170

Cliff of Los Gigantes - Los Gigantes coastal town, whose name comes from Acantilados de los Gigantes, huge cliffs that reach
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Cliff of Los Gigantes

Added 2 weeks ago by Monika

102

Bosporus.. - Turkey. Istanbul. Bridge.
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Bosporus..

Added 2 weeks ago by Grażyna

106 1

Caribbean. - Blooming tree on the beach.
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Caribbean.

Added 3 weeks ago by Grażyna

228

Sardinia. - The second largest - after Sicily - island in the Mediterranean. The territory of Italy.
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Sardinia.

Added 3 weeks ago by Zeta

185 1

Island of Ischia. - Italian island of Ischia.
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Island of Ischia.

Added 3 weeks ago by Zeta

225 1

sunset in Dziwnów - sunset in Dziwnów
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sunset in Dziwnów

Added 3 weeks ago by Druuna

32

Zalew Zegrzyński. - Pilawa port on the Zegrze Reservoir.
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Zalew Zegrzyński.

Added 3 weeks ago by Zeta

56

Beautiful Masuria. - Our beautiful and fairy-tale Masuria.
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Beautiful Masuria.

Added 3 weeks ago by Zeta

60 1

Portofino. - Europe. Italy. Portofino.
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Portofino.

Added 3 weeks ago by Grażyna

75

Torpedownia - Torpedownia in Gdynia view from the beach
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Torpedownia

Added 3 weeks ago by ha ha

37

Monkey Island. - Rożnowskie Lake: Monkey Island.
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Monkey Island.

Added 3 weeks ago by Grażyna

51

wooden bridge - wooden jetty seaside landscape
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wooden bridge

Added 3 weeks ago by sandra

98

beautiful - oj la la la la la la la
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beautiful

Added 3 weeks ago by MAJAMA

204

Walking promenade. - Albania. Walking promenade.
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Walking promenade.

Added 3 weeks ago by Grażyna

217 1

Australia. - Australia. Charming Sydney.
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Australia.

Added 4 weeks ago by Grażyna

84

Sniardwy lake. - A bridge on the lake Śniardwy.
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Sniardwy lake.

Added 4 weeks ago by Zeta

91

Bora-Bora. - Rajskie Bora-Bora in French Polynesia.
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Bora-Bora.

Added 4 weeks ago by Zeta

75

Polish accent on Zanzibar. - House of Vanilla House Dorota Katende, a Polish traveler.
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Polish accent on Zanzibar.

Added 4 weeks ago by Zeta

156 1

Santorini. - Hotel pool on Santorini.
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Santorini.

Added 4 weeks ago by Zeta

102

Hel Peninsula. - Our Polish Maldives. And the sand is nicer.
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Hel Peninsula.

Added 4 weeks ago by Zeta

96 1

Merry boat. - Cheerful "submarine".
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Merry boat.

Added 4 weeks ago by Zeta

57

Boracay. Philippines. - A tiny, charming island. Once you reach Manila, the travel costs are really low.
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Boracay. Philippines.

Added 4 weeks ago by Zeta

67

End of summer. - Me, too, Yolu, it's a pity of summer. Perspective for the next 7 months uninteresting.
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End of summer.

Added 4 weeks ago by Zeta

81

Flowers on the pier. - Flowerpots with flowers on the pier.
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Flowers on the pier.

Added month ago by Zeta

196 1

Faroe Islands. - Lake Sorvagsvatn in the Faroe Islands.
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Faroe Islands.

Added month ago by Zeta

68

Faroe Islands. - Faroe Islands in the Norwegian Sea. The territory of Denmark.
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Faroe Islands.

Added month ago by Zeta

118 1

lantern - lighthouse in the distance, beach
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lantern

Added month ago by Elizabeth

213

Salt collection. - A collection of salt in Vietnam.
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Salt collection.

Added month ago by Zeta

74

A calm haven. - Boats on a calm lake.
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A calm haven.

Added month ago by Zeta

95

Portuguese Azores. - A hiking trail in the Azores.
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Portuguese Azores.

Added month ago by Zeta

72

Wawel at sunset - Wawel at sunset.
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Wawel at sunset

Added month ago by Zeta

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