Széchenyi Lánchíd (Chain Bridge), Budapest
Districts I and V
Concierge.com's insider take:
The first permanent bridge across the Danube, unveiled in 1849, this city icon was designed by Englishman William Tierney Clark and Scottish engineer Adam Clark and funded by influential aristocrat Count István Széchenyi. Despite founding the Academy of Sciences and doing much else to reform the bad old feudal ways of his land—including introducing domestic gaslight and flush toilets—Széchenyi ended up committing suicide in the suburbs of Vienna. Long story.