There are different sizes of groups that travel together. Smaller guided tours tend to get more access to local and unique sites. The company Overseas Adventure Travel offers only small group tours with fewer than 16 people. According to the company's website, "You'll journey off the beaten path to the places the big tour groups miss---and enjoy an intimate, discovery-filled adventure."
Specialty tours such as those for seniors are popular options in guided group travel. The travel company 50 Plus offers all-inclusive guided tours for seniors, both singles and couples alike. There are also family, couples, singles and even pet-friendly overseas group tours.
Booking an overseas group tour is possible through many websites. In the new millennium, booking holidays online is no longer risky and quite a popular option with travelers. Booking through a local travel agent may be more beneficial for some, since you can get personalized service. Local agents are able to answer any questions directly with a simple phone call.