The Doors were an American rock band formed in 1965 in Los Angeles, with vocalist Jim Morrison, keyboardist Ray Manzarek, guitarist Robby Krieger, and John Densmore on drums. The band got its name, at Morrison's suggestion from the title of Aldous Huxley's book The Doors of Perception, which itself was a reference to a quote made by William Blake, "If the doors of perception were cleansed, everything would appear to man as it is, infinite." They were unique and among the most controversial and influential rock acts of the 1960s, mostly because of Morrison's lyrics and charismatic but unpredictable stage persona. After Morrison's death in 1971, the remaining members continued as a trio until disbanding in 1973.

The Doors staged a return to form with their 1970 LP Morrison Hotel, their fifth album. Featuring a consistent hard rock sound, the album's opener was "Roadhouse Blues". The record reached No. 4 in the United States and revived their status among their core fanbase and the rock press. Dave Marsh, the editor of Creem magazine, said of the album: "the most horrifying rock and roll I have ever heard. When they're good, they're simply unbeatable. I know this is the best record I've listened to ... so far". Rock Magazine called it "without any doubt their ballsiest (and best) album to date". Circus magazine praised it as "possibly the best album yet from the Doors" and "good hard, evil rock, and one of the best albums released this decade". The album also saw Jim Morrison returning as main songwriter, writing or co-writing all of the album's tracks. The 40th Anniversary CD reissue of Morrison Hotel contains outtakes and alternate takes, including different versions of "The Spy" and "Roadhouse Blues" (with Lonnie Mack on bass guitar and the Lovin' Spoonful's John Sebastian on harmonica).  July 1970 saw the release of the Doors' first live album, Absolutely Live.  The band continued to perform at arenas throughout the summer. Morrison faced trial in Miami in August, but the group made it to the Isle of Wight Festival on August 29. They performed alongside Jimi Hendrix, the Who, Joni Mitchell, Jethro Tull, Taste, Leonard Cohen, Miles Davis, Emerson, Lake & Palmer and Sly and the Family Stone. Two songs from the show were featured in the 1995 documentary Message to Love.

Using a quote from the above article, answer the following question: What is Morrison Hotel?
The Doors staged a return to form with their 1970 LP Morrison Hotel, their fifth album.