Socotra Island, Yemen

Socotra Island is one of the most alien-looking place on Earth, thanks to its weird-looking Dragon's Blood Tree.

Located on Yemen's Gulf of Aden, Socotra Island contains over 800 rare species of plants, a third of which can't be found anywhere else in the world. Some of them do look a bit extraterrestrial, but their odd shapes reflect how they've adapted to the island's tropical desert climate.

A UNESCO World Heritage Site, Socotra Island has 40,000 inhabitants, but only built its first road in 2011.

Socotra Island is about 400 miles from Sanaa, the capital of Yemen, from which flights are available.