which is the tallest underwater mountain?
610041
Mauna Kea.  It starts underwater, but continues above the surface.  From base to summit it is actually taller than Mt Everest!\n\nThe tallest underwater mountain on Earth is Mauna Kea on the big island of Hawaii. Mauna Kea rises 13,796 feet above sea level and rises a total of 33,476 feet from the Pacific Ocean floor.\n\n[modified to give you some references to check]\n\n"Hawaii's Mauna Kea, though, rises an astonishing 33,476 feet (10,203 meters) from the depths of the Pacific Ocean floor. Measuring from base to peak, Mauna Kea is the tallest mountain on earth." http://hypertextbook.com/facts/2001/BeataUnke.shtml\n\n"Sea-level is such an arbitrary starting value for measuring the height of a mountain. If you ignore it then the tallest mountain on earth is not Mt. Everest but Mauna Kea on Hawaii, “the Big Island.” Mauna Kea is 13,796 ft high starting from sea-level with another 17,000 ft extending to its base below the ocean." http://www.steephill.tv/2006/mauna-kea/\n\n"EARTH'S TALLEST MOUNTAIN IS UNDERWATER\nHawaiian submarine (undersea) volcanoes are large, spreading volcanoes and are very tall. From the bottom of the sea floor to its summit, the Mauna Kea volcano is 9,000 meters (29,520 feet) high, making it the tallest mountain on Earth, approximately 150 meters (490 feet) higher than Mount Everest." http://www.waterencyclopedia.com/Tw-Z/Volcanoes-Submarine.html
845978
Palau is one of the most extraordinary diving spots on this planet. Far to the southwest of Micronesia the Republic of Belau (the traditional name) consists of an archipelago of 343 islands, spread north to south over 100 miles form the atoll of Kayangel to the island of Angaur plus five tiny islands, known as the southwest islands. \n\nPalau's profuse, unspoiled reefs offer a wealth of marine life, coral formations and wrecks. Dives begin in knee deep water and plunge straight down to depths of 1000 feet and more. \nBlue holes, huge caverns and an immense variety of rare and exotic marine species are easily accessible in clear water with visibility exceeding 200 feet. Vast numbers, not found anywhere else in the world, of large pelagic predators, sharks, turtles, dolphins and many species of migratory fish gather here at a unique crossroads of three of the world's major ocean currents. Land locked marine lakes, accessible from the sea through tunnels beneath the island's steep shorelines, are home to rare jelly fish, anemones and soft corals. \n\nPalau's famed "Rock Islands" are a collection of rounded, foliage-covered isles which seem to float above the surface of the water. A boat trip through them will reveal a number of magnificent white sand beach hideaways perfect for a secluded picnic or adventurous overnight stay. Below the water's surface, divers and snorkelers are treated to a diverse technicolor paradise of fabulous drop-offs, blue holes , breathtaking reefs, crystal caves and World War II wrecks. \n\nDiving & Snorkeling\nPalau offers an enormous number of diversified diving experiences not duplicated anywhere else in the world. There are over 100 different dive sites in and around the 90 mile coral lagoon and adjacent islands. \nPalau was named the Number One Underwater Wonder of the World by CEDAM -- a group of marine scientists and conservationists. \nOver 1300 types of fish inhabit the region, including manta rays, barracuda, sharks and giant clams. \nThe world famous Rock Islands are a divers "must" with magnificent wall diving at such legendary sites as Blue Corner, Ngmelis Drop-off, Blue Hole and Peleliu Corner. \nBecause of the clarity of the waters, snorkeling is excellent in or near almost all of the famous dive sites of Palau. \n\n Other Activities\nThere are a number of sightseeing tours available to visitors, including: \n\nRock Island Tour--boat ride around Palau's famous Rock Islands with picnicking \nStone Faces and Monoliths of Ngarchelong--hike through traditional villages and lovely jungle scenery to mysterious and ancient stone monoliths left by the early Palauans \nBelau National Museum--the oldest in Micronesia, offering a history of Palau through its handicrafts and artifacts. A fine example of a traditional bai (men's house) sits on the property. \nHelicopter Tours \nAir Tours \nAdventure Kayaking \nScuba Diving--various packages available \n\nCarp Island Resort\nCarp Island Resort, located on Ngercheu Island, sanctuary to frigate birds, white egrets and a variety of additional bird life, near the fabulous Ngemelis Dropoff, offers panoramic views of the Rock Islands. White sand beaches, littered with seashells, lure sunbathers. Daily transfers, a one hour boat ride from the city of Koror, depart the island at 8:00am and return at 4:00pm.\n\nComfortable accomodation ranges from individual bungalows, duplex seaside cottages and the divehouse, dormitory style for the budget conscious traveler or diver. The island restaurant offers a variety of choices for breakfast, lunch and dinner. Seafood specials must be requested 24 hours in advance.\n\nCoral reefs teeming with brilliant marine life furnish world class diving for every level of certification, and snorkelers, alike. Certification courses are available at the dive center. Sports fishing excursions, bottom, casting and trawling, are available.
957623
Highest Elevation\nTaum Sauk Mountain\n1,772 ft  (540 m)\n\nYou could get more information from the link below...
911163
Is this a trick question? Mt. Everest was the tallest, whether people measured it or not.\n\nOr do you mean, which one did we THINK was the tallest before Everest took that title? Better ask what you mean!
214946
The deepest point in the ocean is the Mariana Trench located in the Pacific Ocean near the Northern Mariana Islands. It has a maximum depth of 10,923 m (35,838 ft) [2]. It was fully surveyed in 1951 by the British naval vessel, "Challenger II" which gave its name to the deepest part of the trench, the "Challenger Deep".\n\nMuch of the bottom of the world's oceans is unexplored and unmapped. A global image of many underwater features larger than 10 km was created in 1995 based on gravitational distortions of the nearby sea surface.
273899
The deepest place is near the Mariana Islands in the Pacific. The water is over 36,000 feet deep in the Mariana Trench. That's over 7 miles deep. Mount Everest is only 6 miles high!
705482
On land, the longest mountain range is the Andes of South America which is 7564 km (4700 mi) in length.\n\nBut if including underwater mountains, mid-Atlantic ridge would be the longest, extending 64,374 km (40,000 mi) from the Arctic Ocean to the Atlantic Ocean, around Africa, Asia, and Australia, and under the Pacific Ocean to the west coast of North America.\n\n(For the person that said the Himalayas, that would be the *highest* not the longest.)
581532
Mt Mckinley has the greatest rise from surrounding plain to peak, I think.  Mt Everest is the highest.
156632
Johnston Island in the Hawaii island chain (717 miles W.S.W. of Honolulu) reaches its greatest height of 44 feet in "Summit Peak" near its eastern end.\n\nThat was fun!
1030915
Challenger Deep in the Mariana Trench is the deepest point in the ocean. Measurements varying from 35,797 to 35,838 feet have been taken.
885279
Mauna Kea in Hawaii is the world's tallest mountain from base to peak! Its base is on the sea floor and it rises 33,480 feet (10,314 meters) in total, while Mt. Everest which is located on the border between Nepal and China, not in India like the person "Student" said.  Mt. Everest from base to peak is 29,028 feet (8,848 meters). Mt. Mauna Kea beats Everest by 4,452 feet (1,466 meters). It's true that Mt. Everest reaches the highest, but it's not the tallest.
1144865
Underwater cave diving
279960
The M6 goes over The Shap summit which is over 1,000ft I think thats the highest.
126937
Mt. Everest (29,035 ft) is the highest mountain in the world and is part of the Himalayan Mountain chain running along the border between Nepal and Tibet (China).
57343
The deepest lake is lake Baikal. In east Siberia, Russia.\nThe Olkhon Crevice, the deepest point of the lake, has a depht of 5,875 ft., of wich 3,875 are below sea level.\n...........................\nThe biggest lake, is the Caspian Sea, an island sea wich covers parts of Azerbaijan, Russia,etc.\nIt's 760 miles long,with a surface area of 143,560 miles and an estimated volume of 21,500 cubic miles.\n..............................\nI also heard that the lake Tangyanika in central africa is the bigguest....
600657
Lake Titicaca.\nThe highest lake in the world!\n\n\nGoodluck!
1049053
The deepest point in the ocean is the Mariana Trench located in the Pacific Ocean near the Northern Mariana Islands. It has a maximum depth of  (35,838 ft) It was fully surveyed in 1951 by the British naval vessel, "Challenger II" which gave its name to the deepest part of the trench, the "Challenger Deep".Much of the bottom of the world's oceans is unexplored and unmapped. A global image of many underwater features larger than 10 km was created in 1995 based on gravitational distortions of the nearby sea surface.