The first stop is Roskilde, 30 minutes west of Copenhagen. This pleasant town was the seat of the bishop and the residence of Danish royalty until 1450. In its day, it was the second biggest city in the country. Today it's famous for hosting northern Europe's largest music festival.

Hopping on the train by 8 am puts me in Roskilde at 8:30 am, and allows me to be at the cathedral when it opens at 9 am.

Roskilde's cathedral is Denmark's Westminster Abbey. It houses the tombs of 39 Danish kings and queens in a modern-looking church with great marble work, paintings, wood carvings, and an engaged congregation that makes the place feel very alive — particularly in largely unchurched Scandinavia.

Completed in 1280, Roskilde Cathedral was cleared of its side chapels and altars by the Reformation iconoclasts — leaving a blank slate for Danish royals to fill with their tombs. The highlight is strolling through a half-millennium of royal chapels, representing a range of architectural styles, from the rather austere tomb of Christian IV (ironically, one of Denmark's least austere monarchs), to the grand Neoclassical tomb of Frederik V (with mourning maidens in ancient Greek gowns), to the brick chapel outside housing the remains of Denmark's last king, Frederik IX, an avid sailor who requested to be buried with a view of the harbor. Each king or queen commissioned a tomb that suited his or her time — so different, yet all so grand.

The next stop on the blitz is the Viking Ship Museum, a 10-minute stroll from the cathedral. "Vik" literally means "shallow inlet," and "vik-ings" were the people who lived along those inlets. Roskilde — and this museum — are strategically located along one such inlet.

Centuries before Europe's Age of Exploration, Viking sailors navigated their sleek, sturdy ships as far away as the Mediterranean, the Black Sea, and the Americas. This museum displays five different Viking ships, all deliberately sunk a thousand years ago to block an easy channel into this harbor, then excavated in modern times. The vessels represent an impressive range of shipbuilding technology, from a big, sail-powered ocean-going trade ship (like the one Leif Eriksson took to America 1,000 years ago), to a 100-foot-long, 60-oar longship, to a fishing vessel used for whaling and hunting seals.

The museum also has replica Viking ships bobbing in the harbor, a boatyard where modern craftsmen re-create millennium-old ships using original methods and materials, and traditional craft shops like a basket maker and wood carver, sometimes staffed by workers doing demonstrations.

The final stop for the day is Frederiksborg Castle, which sits like a fairy tale on an island in the middle of a lake, 50 minutes north of Copenhagen. To get there from Roskilde, I hop a 1 pm train back to Copenhagen (buying a picnic lunch at Roskilde station and munching it onboard). Back in Copenhagen, I jump on the next train to the cute town of Hillerød and from there, a bus to Frederiksborg Castle.

The grandest castle in Scandinavia, Frederiksborg is often called the "Danish Versailles." Built in the early 1600s, Frederiksborg was the castle of King Christian IV. From the entrance of the castle complex, it's an appropriately regal approach to the king's residence. I can almost hear the clopping of royal hooves on the cobbled lane as I walk over the moat.

Inside is the grandest royal chapel in Europe. For 200 years the coronation place of Danish kings, the chapel is still used for royal weddings. The castle also houses an exhaustive but fascinating museum collection spanning three floors. The museum juxtaposes portraits, paintings of historical events, furniture, and other objects, including the first Bible translated into Danish and a golden globe illustrating Copernicus' bold new theory — that the sun, not the earth, was the center of our world.

After exploring five centuries of Danish history at the castle, I'm ready to return to modern times. I hop on a 6 pm train and am back in Copenhagen by dinnertime, having seen the highlights of Zealand in one busy but thrilling day.

Rick Steves ( writes European travel guidebooks and hosts travel shows on public television and public radio. Email him at This email address is being protected from spambots. You need JavaScript enabled to view it. and follow his blog on Facebook.