Last week , US President Barack Obama visited upstate New York's Baseball Hall of Fame and Museum in an effort to highlight some of the United States' most-loved destinations and increase international tourism . " When it comes to tourism , we have a great product to sell , " he said . " Nothing says ' Made in America ' better than the Empire State Building or the Hoover Dam . " According to statistics , a record 70 million international visitors travelled to the US in 2013 . But that was still only 13% of the world's travelers--a smaller market share than the 17% that visited the United States in 2000 . Beyond the country's iconic locations--which travelers know all too well--the US is home to a great many charming and fascinating sights that often fly under the radar . Here are some of our favorites : The wild woodlands of the Great Smoky Mountains One of the oldest mountain rages in the world , this tranquil national park , which stretches across the Tennessee-North Carolina border , has a rich biodiversity that's equaled by few other places on the planet . Texas : Home to the world's largest bat colony Take nature watching to the extreme in the Lone Star State , where 1.5 million bats take flight over Austin every summer night . Idyllic beach towns--without the crowds Hidden away from the flood of summer travelers , these five little beach towns offer excellent surf spots , scenic views and Victorian charm . Philadelphia's mosaic masterpiece The city's downtown offers a one-of-a-kind artistic exploration , with 50,000sqft of tunnels , caves and walls covered in a bright and strange display of glass tiles , poetry and toys . Kentucky : An adventure heaven This state has one of the most amazing environments in the country , featuring both a rock climbing resort and the world's longest known cave system . If you are interested in the cave adventure , you can go to   _   .
Tennessee Kentucky Texas New York
Question: Last week , US President Barack Obama visited upstate New York's Baseball Hall of Fame and Museum in an effort to highlight some of the United States' most-loved destinations and increase international tourism . " When it comes to tourism , we have a great product to sell , " he said . " Nothing says ' Made in America ' better than the Empire State Building or the Hoover Dam . " According to statistics , a record 70 million international visitors travelled to the US in 2013 . But that was still only 13% of the world's travelers--a smaller market share than the 17% that visited the United States in 2000 . Beyond the country's iconic locations--which travelers know all too well--the US is home to a great many charming and fascinating sights that often fly under the radar . Here are some of our favorites : The wild woodlands of the Great Smoky Mountains One of the oldest mountain rages in the world , this tranquil national park , which stretches across the Tennessee-North Carolina border , has a rich biodiversity that's equaled by few other places on the planet . Texas : Home to the world's largest bat colony Take nature watching to the extreme in the Lone Star State , where 1.5 million bats take flight over Austin every summer night . Idyllic beach towns--without the crowds Hidden away from the flood of summer travelers , these five little beach towns offer excellent surf spots , scenic views and Victorian charm . Philadelphia's mosaic masterpiece The city's downtown offers a one-of-a-kind artistic exploration , with 50,000sqft of tunnels , caves and walls covered in a bright and strange display of glass tiles , poetry and toys . Kentucky : An adventure heaven This state has one of the most amazing environments in the country , featuring both a rock climbing resort and the world's longest known cave system . If you are interested in the cave adventure , you can go to   _   .
A. Tennessee
B. Kentucky
C. Texas
D. New York
Answer: