Evidence of our nation's birth abounds in Boston, a hub of revolution that is essentially the oldest city in the United States. Visitors are compelled to walk the 2.5-mile Freedom Trail around the city center, and bear witness to 16 historical locations related to the history of America.

The Temple of Horus at Edfu has a massive entrance pylon covered with sunk relief carvings. This Ptolemaic temple was constructed between 237 and 57 B.C.E.

Wrocław, a captivating gem in southwestern Poland, enchants visitors with its rich history, vibrant culture, and stunning architecture. The city’s picturesque Old Town is centered around the magnificent Market Square (Rynek), where colorful facades and historic buildings like the Gothic Wrocław Town Hall create a fairy-tale atmosphere.

Located on the coast of Sinaloa, Mexico, Mazatlán is a trendy resort town with spectacular beaches and thrilling nightlife. Centro Histórico (Old Town) and Plazuela Machado are replete with colorful, newly-restored neoclassical buildings.

Stromboli is a small volcanic island in the Tyrrhenian Sea, just off the north coast of Sicily. Referred to by some as the "Lighthouse of the Mediterranean," Stromboli is in a constant state of mild volcanic activity, so don't venture out on a hike without an experienced guide.