9 Best Sights in Heidelberg and the Neckar Valley, Germany

This former residence of the counts and dukes of Württemberg was originally built as a moated castle around 1320. Wings were added in the mid-15th century, creating a Renaissance palace. The palace now houses the Landesmuseum Württemberg (Württemberg State Museum), with exhibits tracing the area's development from the Stone Age to modern times and a floor of jaw-dropping family jewels of the fabulously rich and powerful Württemberg royals. There's also a separate floor dedicated to a children's museum.

This is a rare example of a well-preserved medieval monastery from the late 12th century, becoming one of the wealthiest in the region, with a boarding school added in 1504. It was annexed by the local government in 1806, and in 1868 parts of the complex were rebuilt as a hunting castle for King Frederick of Württemberg. Expansion and restoration continued as long as the palace and monastery continued to be a royal residence. Visits to the palace are available only on a guided tour; English-language tours are available only by special arrangement (usually for groups).

The majestic silhouette of this massive castle is visible from miles away. The Hohenzollern House of Prussia was the most powerful family in German history. It lost its throne when Kaiser William II abdicated after Germany's defeat in World War I. The Swabian branch of the family owns one-third of the castle, the Prussian branch two-thirds. Today's neo-Gothic structure, perched high on a conical wooded hill, is a successor of a castle dating from the 11th century. On the fascinating 45-minute castle tour you'll see the Prussian royal crown and beautiful period rooms, all opulent from floor to ceiling, with such playful details as door handles carved to resemble peacocks and dogs. The restaurant on the castle grounds, Café Restaurant Burg Hohenzollern, offers choices from vegan up to rump steak along with pastries from  the local confectioner,  and there's an outdoor beer garden in season. From the parking lot it's a 20-minute walk to the castle entrance; the shuttle bus is now included in the admission price. English-language tours on request. 

The largest and oldest castle in the Neckar Valley, the circular bulk of Burg Hornberg rises above the town of Neckarzimmern. The road to the castle, which dates from the 11th century, leads through vineyards that have been providing dry white wines for centuries. These days, the castle is part hotel (24 rooms) and part museum. In the 16th century it was home to the larger-than-life Götz von Berlichingen (1480–1562). When the knight lost his right arm in battle, he had a blacksmith fashion an iron replacement. Original designs for this fearsome artificial limb are on view in the castle, as is his suit of armor.

For many Germans, this legendary knight is best remembered for a remark that was faithfully reproduced in Goethe's play Götz von Berlichingen. Responding to an official reprimand, Von Berlichingen told his critic, more or less, to "kiss my ass" (the original German is a bit more earthy: Er kann mich am Arsche lecken). To this day the polite version of this insult is known as a Götz von Berlichingen. Inquire at the hotel reception about visiting the castle, or just enjoy the walking trails and views from the top of the hill.

One of Europe's largest palaces to survive in its original condition, Residenzschloss Ludwigsburg certainly merits a visit for its sumptuous interiors and exquisite gardens. The main palace is also home to the Keramikmuseum, a collection of historical treasures from the porcelain factories in Meissen, Nymphenburg, Berlin, Vienna, and Ludwigsburg, as well as an exhibit of contemporary ceramics. The Barockgalerie is a collection of German and Italian baroque paintings from the 17th and 18th centuries. The Modemuseum showcases three centuries of fashion, particularly royal clothing of the 18th century, and the Kinderreich shows how children lived during those centuries. The castle is surrounded by the fragrant, colorful 74-acre park Blühendes Barock (Blooming Baroque), filled with thousands and thousands of tulips, huge masses of rhododendrons, and fragrant roses. A Märchengarten (fairy-tale garden) delights children of all ages. Entrance to the palace rooms are with guided tours only; they are hourly year-round, including some in English. From the bus station downtown, take lines 421, 427, 430, 443 or 444 to the stop Residenzschloss, or walk (ten minutes)

What's most striking is the architectural variety of this great castle complex. The oldest parts still standing date from the 15th century, though most of the castle was built during the Renaissance in the baroque styles of the 16th and 17th centuries, when the castle was the seat of the Palatinate electors. There's an "English wing," built in 1612 by the elector Friedrich V for his teenage Scottish bride, Elizabeth Stuart; its plain, square-window facade is positively foreign compared to the castle's more opulent styles. (The enamored Friedrich also had a charming garden laid out for his young bride; its imposing arched entryway, the Elisabethentor, was put up overnight as a surprise for her 19th birthday.) The architectural highlight remains the Renaissance courtyard—harmonious, graceful, and ornate.

Even if you have to wait, make a point of seeing the two-story Grosses Fass (Great Cask) in the cellar, possibly the world's largest wine barrel, made from 130 oak trees and capable of holding 58,500 gallons. It was used to hold wines paid as taxes by wine growers in the Palatinate. The Deutsches Apotheken-Museum is also included in your ticket and worth a look to see six re-created apothecaries dating back as far as the 17th century. In summer there are fireworks displays, on the first Saturday in June and September and the second Saturday in July, to commemorate when the castle went up in flames in 1689, 1693, and 1764. In June and July the castle hosts a theater festival. Performances of The Student Prince often figure prominently. Take the Königstuhl Bergbahn, or funicular—faster and less tiring than hiking to the castle on the Burgweg. Audio guides are available in eight languages.

One of the best-preserved Neckar castles is the 15th-century Burg Guttenberg. Within its stone walls are a museum and a restaurant (closed January, February, and Monday) with views of the river valley. The castle also is home to Europe's leading center for the study and protection of birds of prey, the German Raptor Research Center, with 100 falcons and other birds of prey. There are demonstration flights from the castle walls from April through October, daily at 11 and 3.

The original castle of the counts of Tübingen (1078) was significantly enlarged and altered by Duke Ulrich during the 16th century. Particularly noteworthy is the elaborate Renaissance portal patterned after a Roman triumphal arch. The coat of arms of the duchy of Württemberg depicted in the center is framed by the emblems of various orders, including the Order of the Garter. Today the castle's main attraction is its magnificent view over the river and town and—of course—its extensive collection of artifacts from ancient cultures, including Ice Age and Egyptian art. The astronomy observatory, dating from the early 1800s, has been restored and re-opened to visitors. It's a 90-minute walk from Schlossbergstrasse, over the Spitzberg, or via the Kapitänsweg that ends north of the castle. Alternatively, you an take the 916 bus from downtown (€2–€4, 44 min.).

This formal 18th-century palace was constructed as a summer residence by the Palatinate electors. It is a noble rose-color building, imposing and harmonious; a highlight is the rococo theater in one wing. The extensive park blends formal French and informal English styles, with neatly bordered gravel walks trailing off into the dark woodland. Fun touches include an exotic mosque—complete with minarets and a shimmering pool (although they got a little confused and gave the building a very baroque portal)—and the "classical ruin" that was de rigueur in this period. The palace interior can only be visited by tour. It's one of Germany's many UNESCO World Heritage sites.