Visiting Filming Locations of "Hellboy" (2004) in Prague, Czech Republic

Directed by Guillermo del Toro.
Produced by Lawrence Gordon, Mike Richardson & Lloyd Levin.
Screenplay by Guillermo del Toro.
Story by Guillermo del Toro & Peter Briggs Based on Hellboy by Mike Mignola.
Starring Ron Perlman, Selma Blair, Jeffrey Tambor, Doug Jones, Rupert Evans, John Hurt.

Hellboy is a 2004 American supernatural superhero film, starring Ron Perlman and directed by Guillermo del Toro. The film is loosely based on the Dark Horse Comics graphic novel Hellboy: Seed of Destruction by Mike Mignola.
It was produced by Revolution Studios, and distributed by Columbia Pictures. The film is about a demonic beast turned into superhero, known as Hellboy, who secretly works to keep the world safe from paranormal threats with his team, the Bureau of Paranormal Research and Defense. -Wikipedia.

The biggest challenge for the location scouting was finding an area to film the New Jersey rooftop scene as it was proven that Prague didn't have many locations that can serve as an American city.
After many false starts, Del Toro finally found the right street for the scene to be filmed in which had to be redressed to look more American. -iMDB.

John Thaddeus Myers (Rupert Evans), a young FBI agent arrives to the BPRD Agency.

(National Memorial on the Vítkov Hill)

Inside the Building.

 The first gig. (The Ministry of Transport /Ministerstvo Dopravy Ceské Republiky).

Hellboy meets Liv at Bellamie Psychiatric Hospital. (Karlínská invalidovna)
The same location has been used in Amadeus (1984).

Back at the Viktov Hill.

 That New Jersey rooftop scene.

In the background you can see Kostel sv. Gabriela and street is Grafická.

 While filming, it was a empty lot, now there's a building.

Pic from Google StreetView.

Trevor Bruttenholm's Funeral at Viktov Hill.