The theme is extreme: Amazing amusement park rides

We know you're ready for summer thrills, and these theme rides deliver the goods. Massive roller coasters, sweet water slides and adrenaline-juicing rides await. These crazy rides will plaster a smile on your face and evoke yelps of joy (or apprehension). Sit down, buckle up, hang on, and enjoy these topsy-turvy, lightening fast, sinisterly high challenges built especially for the thrill-seeker in you. Check out the country's best in amusement adventures here: http://on-msn.com/14aa8rF

Daredevil completes tighrope walk over Grand Canyon

Aerialist Nik Wallenda completed a tightrope walk that took him a quarter mile over the Little Colorado River Gorge in northeastern Arizona on Sunday. Wallenda, 34, performed the stunt on a 2-inch-thick steel cable, 1,500 feet above the river on the Navajo Nation near the Grand Canyon. He took just more than 22 minutes, pausing and crouching twice as winds whipped around him and the rope swayed. The event was televised live on the Discovery Channel.
Wallenda didn't wear a harness and stepped slowly and steady throughout, murmuring prayers to Jesus almost constantly along the way. He jogged and hopped the last few steps.
Do you think Mr. Wallenda is brave ... or crazy?

Keep your eyes on the road!

Interested in a truly stomach-flopping adventure? Take a journey over some of these bridges … the world’s highest. Warning: If you’re leery of heights, don’t look down. China boasts the lion’s share of the highest bridges, with 3 of the planet’s top 5. Tallest in the U.S. is the Royal Gorge Bride in Cañon City, Colorado (pictured here). At nearly 1,000 feet high, the bridge is taller than it is long. What’s the tallest bridge you’ve even been on? Did you look down?

Missing document signed by Lincoln found at Pennsylvania college

A long-missing certificate with Abraham Lincoln's signature was found recently at a college in Pennsylvania by the school president. The retiring president of Lycoming College was cleaning out his closet when he found the 150-year-old document. James Douthat was pulling out what he thought was an access panel to plumbing when he discovered a framed certificate, dated 1863, which named the college’s founder, a Civil War chaplain. A similar certificate also signed by Lincoln recently sold for $11,000, according to a noted autograph dealer.

Have you ever made a surprise discovery of something valuable?