The longest place names in the world

Chargoggagoggmanchauggagoggchaubunagungamaugg  is a small lake near the town of  Webster, Massachusetts, USA.
Lake Chargoggagoggmanchauggagoggchaubunagungamaugg, a 45-letter alternative name for this body of fresh water, is often cited as the longest place name in the United States and one of the longest in the world. Today, "Webster Lake" may be the name most used, but some, take pride in reeling off the longer versions.

Lake Chargoggagoggmanchauggagoggchaubunagungamaugg sign (with 2 misspellings) 
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Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch  is a village in Wales. The long form of the name is the longest officially recognised place name in the United Kingdom and one of the longest in the world, being 58 letters in length . The name means: St Mary's Church (Llanfair) in a hollow (pwll) of white hazel (gwyngyll) near (goger) the swirling whirlpool (y chwyrndrobwll) of the church of St Tysilio (llantysilio) with a red cave ([a]g ogo goch).
Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch.com is the longest single word (without hyphens) .com domain name in the world.

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Taumata­whakatangihanga­koauau­o­tamatea­turi­pukakapiki­maunga­horo­nuku­pokai­whenua­kitanatahu is the Māori name for a hill, 305 metres (1,001 ft) high, south of Waipukurau in southern Hawke's Bay, New Zealand. The name is often shortened to Taumata by the locals for ease of conversation. The New Zealand Geographic Placenames Database, maintained by Land Information New Zealand (LINZ), records the name as "Taumata­whakatangihanga­koauau­o­tamatea­pokai­whenua­ki­tana­tahu". The name on the sign that marks the hill is "Taumata­whakatangihanga­koauau­o­tamatea­turi­pukakapiki­maunga­horo­nuku­pokai­whenua­kitanatahu", which translates roughly as The summit where Tamatea, the man with the big knees, the climber of mountains, the land-swallower who travelled about, played his nose flute to his loved one. At 85 letters, it has been listed in the Guinness World Records as one of the longest place names in the world.

Other forms of the name are longer still: "Taumata­whakatangihanga­koauau­o­tamatea­ure­haea­turi­pukaka­piki­maunga­horo­nuku­pokai­whenua­ki­tana­tahu" has 92 letters. An even longer version, Taumata-whakatangihanga-koauau-o-Tamatea-haumai-tawhiti-ure-haea-turi-pukaka-piki-maunga-horo-nuku-pokai-whenua-ki-tana-tahu, has 105 letters and means The hill of the flute playing by Tamatea — who was blown hither from afar, had a slit penis, grazed his knees climbing mountains, fell on the earth, and encircled the land — to his beloved.

Via: [link]