Visit Railay Beach

Sea cave on the Algarve coast with a round skylight in its domed roof — reached by boat, kayak or paddleboard.

Golden beaches and turquoise coves linked by New Zealand’s easiest Great Walk — kayak in, hike out.

Home of Son Doong, the world’s largest cave, plus Paradise Cave and boat trips into the river cave of Phong Nha itself.

Row through limestone karsts and rice paddies on the "Ha Long Bay on land", then climb to the Mua Cave viewpoint.

Mangroves and tidal flats teeming with migratory birds near Libreville.

Bangka boat trips between limestone lagoons, hidden beaches and the Big and Small Lagoon of Bacuit Bay.

Rwanda’s Riviera — bilharzia-free swimming, kayaking and coffee farms on the shores of a lake ringed by hills.

Calm, clear lagoon with tiny islets.