This beautiful port city and capital of the Nagasaki Prefecture is located on the island of Kyushu.

Waterberg Plateau National Park is a protected area in central Namibia, known for its long sandstone plateau rising above surrounding savanna and thornbush. The porous sandstone supports permanent springs at the base of the plateau, creating greener habitats than those found across much of the surrounding region.

The Lemaire Channel is a spectacular sight with enormous sheer cliffs falling straight into the sea. It's a narrow channel flanked by the Antarctic Peninsula on one side and Booth Island on the other. So photogenic is the channel that it's nicknamed 'Kodak Gap', and it's only once you're well within it that a way through is visible.

Tunis' white-washed, blue-shuttered buildings hide a treasure trove of Arabic and Ottoman art. Inspect illuminated manuscripts from the Koran, follow the twists and turns of the fascinating old Medina (inner city), marvel at the ornate Palace of Dar Ben Abduallah and the magnificent Djamaa-Ez-Zitouna Mosque, whose 184 columns were "recycled" from the rocky ruins of Carthage.

Pigeon Key is a small historic island in the Middle Keys, located just offshore from Marathon beneath the Old Seven Mile Bridge. The island occupies only a few acres, yet its position within the Florida Keys gives it an unusual combination of maritime history and tropical surroundings. Today, Pigeon Key is preserved as a historic and educational site, with restored buildings, a small museum, and facilities for marine science programs.