Tallest Mountain: Mount Everest sits at 8,848 meters or 29,029 feet. above sea level. It is located in the Himalayas of Nepal.
Tallest Building: Burj Khalifa, in Dubai, United Arab Emirates. The tallest building in the world is a man-made structure 829.8m or 2722 ft. tall!
Tallest animal: Giraffes! Giraffes are the tallest animals in the world. Males can grow up to 18 feet!
Tallest Man, Robert Pershing Wadlow (Feburary-22-1918-July-15-1940) reached 8 feet 11.1 inches! 
Tallest Roller Coaster. Six Flags Great Adventure currently houses the tallest roller coaster. Kingda Ka is over 100 feet , It will make its first debut ride Spring  2017.
Tallest Waterfall. Angel Falls. Venezuela is home to this magnificent site. The waterfall plunges 979 m (3212 ft.) with a single, death-defying drop of 807m (2648 ft) that cascades into the remaining height. 
Tallest Staircase. 11674 steps is what it takes to get to the top of this set of stairs located on the face of Mt. Niesen in Switzerland.
World’s Tallest Thermometer. Located in Baker, CA stands at 134 feet.
World’s Tallest Tree. Hyperion is the tallest living Redwood tree measured in at 115.61 m (379.3ft).

Tallest Woman. Zeng Jinlian (1964-1982) of The People’s Republic of China reached 8ft 13/4 
By Liz Sanchez