At the Valley of the Temples, time-travel back to when Sicily was a Greek colony. While little survives of ancient Agrigento, you can wander through the remains of a few grand temples, including the largest Doric temple of the ancient world. More info about travel to Sicily: https://www.ricksteves.com/europe/italy/sicily

Bern's 15th-century cathedral — which boasts Switzerland's highest church tower — underwent major changes during the Reformation, when Protestant iconoclasts removed the then-Catholic church's religious imagery. More info about travel to Bern: https://www.ricksteves.com/europe/switzerland/bern

Experience Paris's past at the Carnavalet Museum, where you can admire the former monarchy's opulence and relive its downfall during the French Revolution. More info about travel to Paris: https://www.ricksteves.com/europe/france/paris

Portugal's Douro Valley is the birthplace of port wine, and its steep and twisting valleys have been laboriously terraced over the centuries. Stop by a family owned winery for a peek at local life — and a taste of some fine port. More info about travel to Douro Valley: https://www.ricksteves.com/europe/portugal/douro-valley

Fire up memories of the Industrial Revolution in its birthplace, the Severn River Valley. And no trip to England's heartland would be complete without a pint at the local pub — where it helps to know the rules. More info about travel to Ironbridge Gorge: https://www.ricksteves.com/europe/england/ironbridge-gorge

In Warsaw, experience Polish culture by trying some traditional vodka and taking a stroll through the city's idyllic 18th-century park, which features a monument to one of Poland's favorite sons, composer Fryderyk Chopin. More info about travel to Warsaw: https://www.ricksteves.com/europe/poland/warsaw

Oxford is home to the oldest university in the English-speaking world. Today, there's plenty to see and do on a visit to Oxford University, from punting on the River Cherwell to marveling at historic colleges and important artifacts. More info about travel to Oxford: https://www.ricksteves.com/europe/england/oxford

Coimbra is home to Portugal's oldest and most prestigious university. When school's in session, Coimbra bustles with a youthful energy. As a traveler, it can be fun to drop into this venerable academic world and revel with students. More info about travel to Coimbra: https://www.ricksteves.com/europe/portugal/coimbra

Mount Etna, on the island of Sicily, is Europe's most active volcano. Today, the slopes of Etna are renowned for their fertile soil — and the finest vineyards in Sicily. More info about travel to Sicily: https://www.ricksteves.com/europe/italy/sicily

Kraków is the Boston of Poland, buzzing with history, college students, and tourists. Even though Warsaw became Poland's political capital centuries ago, Kraków remains the country's cultural and intellectual epicenter. More info about travel to Kraków: https://www.ricksteves.com/europe/poland/krakow