Circumambulation of Ka'bah

Some pilgrims feel frightened to enter the Ka`bah. They think that something evil will happen to them if they do. Is this true?

Respected scholars, as-salamu `alaykum. What I understand from the Qur'an and tafsir (Arabic for: exegesis of the Qur'an) is that Prophet Ibrahim and his son Isma`il (peace and blessings be upon them) raised the foundations of the Ka`bah that were beneath the sand. I wonder who initially laid its foundations; was it Prophet Adam (peace and blessings be upon him)? Jazakum Allahu khayran.