The building at 60 Andrássy Avenue has double-thick walls. They were designed to muffle screams.

Now home to Budapest's House of Terror Museum, this elegant Neo-Renaissance mansion served as headquarters for Hungary's Arrow Cross fascists in 1944, then seamlessly transitioned to the communist secret police, the ÁVH, who expanded its basement into a labyrinth of cells, interrogation rooms and a hidden gallows.

The museum visit ends with an agonisingly slow elevator descent while a former janitor describes, on video, the precise mechanics of executing prisoners below. What awaits in the basement are the original chambers where countless Hungarians were tortured, interrogated and killed across six decades of successive terrors. Outside, a black metal blade crowns the roofline, its cut-out letters spelling TERROR onto the pavement when the sun shines through.

VoiceMap's self-guided audio tours trace the darker chapters of Andrássy Avenue's history, explaining how sections of this UNESCO-listed boulevard were once named after Hitler and Mussolini, and placing the building's twin terrors within Budapest's broader 20th-century story.