Niagara Falls, New York, is home to one of the most powerful natural spectacles in North America. More than 3,000 tons of water pour over the edge every second, creating a thunderous roar and a rising mist that can be felt from blocks away. Visitors can stand just feet from the American Falls at Prospect Point or take the iconic Maid of the Mist boat tour, which has operated since 1846 and now features all-electric vessels.

The Main River winds through the heart of Germany, offering a scenic journey through picturesque towns, rolling vineyards, and historic cities.

La Spezia, a bustling port city in the Liguria region of Italy, is often seen as the gateway to the famous Cinque Terre, bur this vibrant city has much to offer. Visitors can explore the historic center, visit local markets, and partake in a variety of restaurants serving delicious Italian cuisine.

Cardigan sits on the west coast of Wales, where the River Teifi reaches the wide sweep of Cardigan Bay. At the heart of town stands Cardigan Castle, where battlements and gardens overlook the Teifi. The castle’s history includes the first recorded National Eisteddfod in Wales, a cultural competition of music, poetry and performance that still inspires events across the country.

The Darvaza Gas Crater, famously nicknamed the “Door to Hell,” is one of Turkmenistan’s most extraordinary landmarks. Located deep in the Karakum Desert, this fiery pit has been burning continuously since the early 1970s, when Soviet engineers reportedly set fire to a collapsed natural gas field to prevent the spread of methane.