Some of the most spectacular scenery is found on a trip to the San Juan Islands. No wonder. This 100-million-year-old mountain range turned archipelago, located a few miles northwest of Seattle, changes dramatically with the tide. There are 743 islands at low tide--and 428 at high tide.

Puerto Varas is a lakeside city in Chile’s Los Lagos Region, set on the southern shore of Lake Llanquihue with views toward the volcanoes Osorno, Calbuco, Puntiagudo, and Tronador. The waterfront, with its promenade and gardens, forms the center of the city’s relationship with the lake, while wooded hills and agricultural land extend beyond the urban area.

An essential passageway between the Atlantic and Pacific Oceans, the Panama Canal is an extraordinary technological landmark and a testament to human innovation. Built in the early twentieth century by American engineers, the canal weaves through the Panamanian isthmus and allows easy access for commercial freighters and cruise ships alike.

Sioux Falls is South Dakota’s largest city, located in the southeastern part of the state along the Big Sioux River. The river is central to the city’s landscape, most notably where it passes over a series of pink quartzite ledges at Falls Park. Around the urban area, the terrain opens into the broad prairie of the Great Plains, with farmland and gently rolling countryside extending beyond the city.

Guam, a vibrant island territory in the Western Pacific, offers travelers more than just sandy beaches and turquoise water. As the largest island in Micronesia, Guam has a dynamic past that’s shaped its present. Evidence of ancient Chamorro settlements can be found at sites like Latte Stone Park, where limestone pillars dating back over a thousand years stand tall.