Few European capital cities in the 50s and 60s were left without that definitive mid-20th-century landmark, the telecommunications tower, and Vienna is certainly no exception. 

Standing taller than any other building in the city-and in fact the tallest structure in Austria-the 252-meter-tall Danube Tower, the Donauturm, opened to great fanfare in 1964 and continues to attract visitors for its spectacular view over the Danube River.

Highlights of a visit include the speedy elevator ride to the observation deck at 150 meters, from which you can also pick out many of Vienna's most important attractions.