Quiz: The World's Most Stunning Sites

It wouldn't be so great if it were only 50 miles (80 km) long, now would it? Try more than 4,000 miles (6,437 km) long -- now that's pretty great.

One of the seven natural world wonders, the reef that stretches along Australia's northeast coast is more than 1,600 miles (2,574 km) long.

A speedy project, the Empire State Building broke ground in January 1930 and was completed in under 16 months, in May 1931.

Nope, it wasn't the Gettys or the Biltmores (a red herring). The Biltmore House was the brainchild of George Washington Vanderbilt.

One of the most quoted speeches in American history, the Gettysburg Address was not seen as a success at the time. But Abraham Lincoln's words on that November day in 1863 ring true years later.

Though he may be more well known as the "Wizard of Menlo Park," Thomas Edison wasn't born in New Jersey. He was actually born in Milan, Ohio in 1847.

In 1968, the oldest surviving London Bridge was sold for $2.4 million and moved to Lake Havasu City in Arizona.

After 18 years of work to stabilize the tower, it was finally declared "finished" in May 2008.

Originally the Great Pyramid was 280 cubits tall -- that's about 479 feet (144.78 meters). Because of erosion, these days it stands at about 452 feet (137.76 meters). It was the world's tallest man-made structure for an impressive 3,800 years.

While the base was built on Ellis Island in New York, the statue itself was built in Paris as a gift to the United States and assembled once it reached its final destination.

The Appalachian Trail stretches 2,175-miles (3,500 kilometers), running from Maine to Georgia.

Mount Kilimanjaro is the tallest mountain in the continent of Africa. It is 19,340 feet (5,895 meters) high and is located in Tanzania.

The Great Blue Hole is found off the coast of Belize and is 400 feet (125 meters) deep.

The Taj Mahal, located in Agra, India, was built by emperor Shah Jahan in memory of his third wife who died during the birth of their 14th child.

The Stonehenge was a place of burial from its beginning.

Big Ben was completed in 1858 and holds the largest four-faced chiming clock in the world.

The Temple Mount is rich with religious importance with strong ties with the Muslim, Judaism and Christian religions.

The four presidents carved into the mountain are George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln.

There are about 220 steps to climb to see the statue up close.

The coliseum was ruined by an earthquake. Parts of the building were used for the construction of later monuments.