10 tours to check out – Gogobot travel recommendation site users chose their top guided tours as part of site's Travelers' Favorite Awards. Here are the top 10 picks: Underground Tour, Seattle, Washington. The Underground Tour explores Seattle buildings that were covered over when the city rebuilt on top of itself after the Great Fire of 1889. These two photos show some of the relics in areas that were hidden when the street level was raised.
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10 tours to check out – Alcatraz Cruises, San Francisco, California. A range of tours depart daily to the scenic island that was once home to America's most notorious criminals. Tours often sell out a week or more in advance, so book early.
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10 tours to check out – Architecture River Cruise, Chicago, Illinois. The Chicago Architecture Foundation's River Cruise floats by some of the city's most remarkable buildings, including the Marina City towers which were designed by Bertrand Goldberg and opened in 1962.
10 tours to check out – Pacific Whale Foundation, Kihei, Hawaii. A range of whale watching options, including sunrise and full-moon tours, are offered by the Pacific Whale Foundation, a nonprofit research organization.
10 tours to check out – Backpacker Concierge, Cairo, Egypt. Since 2008, Backpacker Concierge has been tailoring unique tours in the Middle East and recently expanded into China, Nepal and Turkey. This photo was taken at the Necropolis of Bagawat near Egypt's Kharga Oasis.
10 tours to check out – Fat Tire Bike Tours, Paris, France. Hop on a bike for a day or night ride through the ever-enchanting City of Light. Guided tours last from four to five hours with frequent stops for conversation and photo ops.