Malacca, also known as Melaka, sits along Malaysia’s west coast and is one of Southeast Asia’s most historically layered cities.

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.

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

This small yet charming city in Alaska's panhandle is a throwback to the gold rush era. Skagway is a well-preserved part of Klondike Gold Rush National Historical Park.

Situated on the northeastern coast of Greece, Kavala is a picturesque port city popular for its archaeological treasures, historic old town, and scenic beach. Be sure to explore the city's best known sites, including the Panagia neighborhood, the Kavala Castle, the towering Aqueduct, and the Kavala Archaeological Museum.