In Berlin, a convenient online ticketing system is making it easier to visit the Reichstag's roof terrace and dome. LAURA VANDEVENTER PHOTO

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Three countries with a rich heritage -- Germany, Hungary and Austria -- each have a constantly evolving sightseeing scene. Here's the latest:

GERMANY

-- Getting into the Reichstag, Berlin's parliament building (with its striking 47-metre-tall glass cupola), has been difficult over the last few years due to changing security and entrance procedures. Things have finally settled down and the process is clear: To visit the dome, it's best to make a free reservation online several days in advance at bundestag.de. Once you have a reservation, simply report to the visitors centre at the appointed time.

-- In Munich, sights are closing and opening. In the Residenz, the downtown palace of the Bavarian kings, the mythological scenes decorating the Halls of the Nibelungen are not on view, undergoing restoration at least through 2014. Reopening in Munich this May is the Lenbachhaus, home to the world's largest collection of early Modernist Blaue Reiter paintings. The refurbished galleries now also host a first-rate collection of international contemporary art.

-- In Bavaria, the new Museum of Bavarian Kings occupies a grand former hotel on the shore of the Alpsee, next to the fairy-tale Hohenschwangau and Neuschwanstein castles. If you have free time between castle tours and a higher-than-average curiosity about arcane Teutonic dynasties, this might be worth a stop. For most visitors, though, the highlight is the view of the lovely lake from the museum's top floor.

-- St. Kilian's Cathedral -- the main church in Wurzburg and the fourth-largest Romanesque cathedral in Germany -- has reopened following a 3.2 million-euro renovation. The ornate stucco decoration inside has been spiffed up and the cathedral's two organs restored.

-- Hamburg's city centre is taking on a new look, thanks to the urban renewal project called HafenCity. Built on 160 hectares reclaimed from disused docklands along the Elbe River, this roughly 15-block area is filling up with "starchitect"-designed buildings and waterside cafes. The anchor is the gigantic, architecturally striking Elbphilharmonie complex, home to a concert hall, hotel, apartments, and shopping centre (due for completion in 2015).

-- Towns in Germany are already preparing for 2017 and the 500th anniversary of the Reformation, the movement started by Martin Luther that led to the establishment of the Protestant Church. In Wittenberg, where Luther began his challenge to papal authority, the Luther Garden is a leafy statement of cooperation between Protestant, Catholic and Orthodox faiths. Hundreds of trees from as many Christian communities from around the world have been planted there, and each has a sister tree growing in its community of origin. Erfurt, Luther's spiritual home, is welcoming visitors with Wednesday evening organ concerts at the Preachers' Church and open-air opera performances on the steps of the cathedral in summer.

HUNGARY

-- Budapest, Hungary's capital, has its fair share of changes. Riverboats operated by the transit authority now connect strategic locations throughout the city. Although not as quick or convenient as Budapest's subway or trams, the boats are a romantic, cheap alternative to pricey riverboat cruises on the Danube.

-- On Castle Hill, the Royal Wine House has closed (temporarily), but the nearby House of Hungarian Wines has reopened, offering a survey of Hungary's wine-growing regions. But the best place to sample local wines is in the company of locals -- try any of the trendy wine bars opening up around town (such as DiVino, in front of St. Istvan's Basilica, on the Pest side of the Danube).

AUSTRIA

-- The news from Austria is all about Vienna. At St. Stephen's Cathedral, visitors can ride an elevator up to the newly opened Cathedral Treasury. The many treasures of the cathedral had been ignored in the nearby cathedral museum, so they've been moved into the church, filling a space above the nave on the west portal wall.

-- The Kunsthistorisches Museum in Vienna is reopening its Kunstkammer (Cabinet of Wonders) exhibit to show off the lavish curiosities the Habsburg emperors gathered to impress their friends and enemies. Meanwhile, in the upstairs Gemaldegalerie gallery, curators have been busily rearranging the paintings.

-- Vienna's most impressive and crowded palace, Schonbrunn, now has an online ticketing system. It's possible to avoid the admission lines there by reserving a timed-entry ticket at the palace's website in advance (schoenbrunn.at).

-- Vienna's train stations will be in disarray for the next few years, as the city rebuilds its central station and remodels several others. The wonderful Westbahnhof (West Station) has already been beautifully renovated -- with the 1950s shell now filled with a modern mall of services, shops and eateries. It's all part of Europe's steady investment in its infrastructure, a commitment that will benefit all travellers to Germany, Hungary and Austria in 2013.

Rick Steves (ricksteves.com) writes European travel guidebooks and hosts travel shows on public TV and radio. E-mail him at rick@ricksteves.com and follow his blog on Facebook.