Resonant stone, that has been played since prehistoric times.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

Dine on Hungarian-Jewish dishes at this multigenerational, family-run institution.

This building has survived for more than a century and remains virtually untouched.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

A two-way chairlift system between Zugliget and the highest point in the city.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

Museum dedicated to the terror regimes of Hungary.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This museum is dedicated to the little known ancient Roman history of Vienna.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

Apartment complexes built into huge repurposed natural gas tanks.

Legends surround an ancient tree trunk riddled with nails for good luck.

A silly medieval mural preserved on the side of a Viennese house.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.