For a fun way to see Frankfurt, hop on the Ebbelwei-Express, a vintage tram that rattles through the city on weekends and public holidays. On board, passengers are served apple wine (or juice) and a bag of pretzels while local music plays in the background. The hour-long ride takes in many of Frankfurt’s main sights, and tickets are sold by the conductor. You can board at any of the tram stops along the route, but the ticket covers one full loop without hopping off and back on again.

Perched atop a hill overlooking the Vltava River, Prague Castle is a magnificent testament to over a millennium of architectural evolution and historical significance. As the largest ancient castle complex in the world, it sprawls across 70,000 square metres and includes stunning Gothic, Renaissance, Baroque, and Romanesque buildings. Visitors can explore the iconic St Vitus Cathedral, the Old Royal Palace, and the charming Golden Lane, all within its storied walls. Once the seat of Bohemian kings and Holy Roman emperors, today it serves as the official residence of the Czech president, making it not only a breathtaking landmark but also a vibrant centre of Czech political life.

Brandishing a sword for the Opera House. Next to the imposing white edifice on Ringstrasse street skirting Graz city centre, the “Lichtschwert” sculpture stands for the protection of human rights. At the same time, it stands in agitating contrast with the neighbouring Opera House and is proof of the city’s cultural awareness. Formerly the city theatre, the Opera House itself is now a splendid stage for breathtaking productions in Graz ranging from musical theatre to ballet.

Historic Ships in Baltimore, a National Historic Landmark, features five historic maritime artifacts: the USS Constellation, the last Civil War-era warship afloat; the USS Torsk, a Cold War submarine; the USCGC Taney, which survived the attack on Pearl Harbor; the Lightship 116 Chesapeake; and the Seven Foot Knoll Lighthouse, one of Baltimore’s oldest lighthouses. Visitors can explore these ships through guided tours, interactive exhibits, and even overnight adventures.