The World Outdoors - Solo Vacations Friendly
The World Outdoors are based in Colarado and have been assisting solo vacationers since 1988. They are very solo traveler friendly where a lot of other companies are not.
Going solo in Belize provides opportunities for many outdoor activites. World Outdoors also offers a Machu Picchu trekking in Peru and other adventures in South America.
If you are interested in the World Outdoors then check out their website theworldoutdoors.com.