Plovdiv, one of the oldest continuously inhabited cities in Europe, carries over 8,000 years of history layered into its streets. The Roman Theater, still in use today, was discovered by accident in the 1970s and now hosts operas and concerts overlooking the Rhodope Mountains. Nearby, visitors can walk the remains of a Roman stadium buried beneath the main pedestrian street, where modern shops and cafés stand above ancient foundations.

Oruro, city in western Bolivia, capital of Oruro Department, located on a plateau about 3700 m (about 12,140 ft) above sea level. Oruro is a major railroad junction and an important commercial and processing center in a mineral, especially tin, mining area. Industries in the city include tin smelting and shoe and clothing manufacture. The Technical University of Oruro (1892) is here. Oruro was settled about 1595 by Spaniards interested in its silver deposits.

Tsavo East National Park is one of Kenya’s largest protected areas, covering about 13,747 square kilometres in the country’s southeast. Its landscape is largely semi-arid, with open plains, scrub, rocky outcrops, and river corridors shaped by the Tsavo, Athi, Galana, and Voi rivers. The park is particularly associated with its dust-red elephants, whose appearance comes from the animals coating themselves in the park’s distinctive red soil.

Lake Tahoe is one of the most dramatic and beautiful sights in the World. A natural lake formed at the top of the Sierra Nevada mountain range, it is now a winter sports center, a summer vacation destination and the home of wonderful casinos and resorts.

Zion National Park, located in southwestern Utah, is known for its massive sandstone cliffs, narrow slot canyons, and unique desert ecosystems. Established in 1919, it was Utah’s first national park and continues to attract visitors with its dramatic elevation shifts and striking rock formations. The park’s most iconic feature, Zion Canyon, stretches for 15 miles and reaches depths of up to 2,640 feet, carved over time by the Virgin River.