Yeah, the first one is a coffin.

THe second one is something along the lines of, "What gate would the other guy not tell me to go in?"

Guy telling the truth would tell you the gate from Heaven (Since the liar would tell you not to go in there because it is hell, but he is lieing.)
Guy lieing would tell you would also tell you the gate from Heaven (Since the truth would be the gate from hell, but the liar would say the opposite, which is Heaven).

Vuala!

No problems guys, I have a shit load of riddles, those were just some of my favorites way back when.

Make a new thread though if you wanna tell more riddles, and lets let this one die again...