Seattletours.com, Seattle

Customized Tours leads groups on guided expeditions of Seattle's most breathtaking spots. Outdoor adventurers can try the Mount Rainier Park, Olympic National Park Tours or the Winery and Waterfall Tour, which travels across Lake Washington on the 7,700-foot Evergreen Point floating bridge. You will experience intimate tastings at boutique wineries and capture the majestic Snoqualmie Falls. Their Grand City Tours explore a variety of tourist attractions across the Seattle, Queen Anne, Fremont, and Chinatown neighborhoods. One of the more unique tours is the Private Transportation with Public Boeing Factory Tour, which gives visitors a behind-the-scenes look at airplane assembly. It also gives them a chance to design their own airplanes using touch-screen computers, or, for traditionalists, old geometry homework.