Ponte de Lima sits along the Lima River in northern Portugal and is often regarded as the country’s oldest town. Its identity centers on the medieval bridge that spans the river, parts of which date back to Roman times and still structure how the town is experienced today.

Alajuela, Costa Rica’s second-largest city, offers a mix of history, culture, and natural wonders that make it more than just the gateway to Juan Santamaría International Airport. The city’s central park, cathedral, and museums create a lively hub where local life unfolds, from weekend markets filled with fresh produce to festivals celebrating music and tradition.

The Great Barrier Reef stretches along Australia’s northeast coast, forming the largest coral reef system on Earth and one of the planet’s most complex living ecosystems.

Osaka is a city that thrives on contrasts with centuries-old castles sit just blocks from neon-lit arcades and high-speed trains. Once known as “Japan’s kitchen” during the Edo period, Osaka played a key role in rice trading and food distribution across the country. Today, visitors can walk the grounds of Osaka Castle, originally built in the 16th century by Toyotomi Hideyoshi, and take in panoramic city views from the top floor of its museum.

A tributary of the Amazon, the Napo River (Río Napo) originates in the east Andes mountains. It flows east through Ecuador, then southeast into Peru, where it joins the larger river roughly 50 miles downstream from Iquitos.