On the Canadian border where Lake Huron and Lake Superior meet, a canal built in 1895 still is used to have boats bypass the rapids of the St. Mary's river.

El Paso, located in far western Texas along the Rio Grande, is a vibrant border city that blends American, Mexican, and Native American cultures. Its location at the meeting point of Texas, New Mexico, and Chihuahua, Mexico, has shaped a rich cultural tapestry, visible in its architecture, cuisine, and community traditions. El Paso’s history stretches from indigenous settlements to Spanish colonial influence, all of which contribute to the city’s unique identity.

Motril, Spain, is located near the Guadalfeo River on the Mediterranean coast in the province of Granada. Sugar cane refineries form the backbone of Motril's economy, though tourism is also an essential industry.

Zagreb, the vibrant capital of Croatia, is a city where history, culture, and a youthful spirit collide in an unforgettable way. Wander through the cobblestone streets of the Upper Town (Gornji Grad) and marvel at its medieval architecture, such as the iconic St. Mark's Church, known for its colorful tiled roof depicting the coat of arms of Zagreb and the Kingdom of Croatia.

Gyeongju-si is a historic city in southeastern South Korea known for its close connection with the Silla kingdom and its concentration of archaeological sites, temples, royal tombs, and Buddhist monuments. Much of the city’s heritage is spread across open landscapes rather than confined to a single historic center. The Gyeongju Historic Areas include Mount Namsan, the Wolseong area, royal tomb complexes, and the remains of major temples and palaces.