You can go anytime, its not a set event or compulsory :)
Visiting the Ka'abah, Safa - Marwa, field of Mina, field of Arafaat, and Muzdalfa, . They may also visit Cave of Thore, Cave of Hira, and the Jabl-i-Noor., jabl-i- Rahamt.
A robber's cave
Yes. Muslims can pray at Abraham's tomb. Currently there is a schedule when Jews can use the Cave of the Patriarchs and when Muslims can use it. However, it is worth noting that the Cave of the Patriarchs is in Hebron, which is part of the Palestinian West Bank and is not a sovereign part of Israel.
rock samples
Because it's the place where the first revelations of the Holy Quran were revealed & consequently it's the place where the angel Jibril "Gabriel" & the prophet Muhammad PBUH had met for the first time.
Mendelssohn's overture "Fingal's Cave"; a cave on the island of Staffa in the Hebrides.
My citiy :) Postojna's Cave
No. Cave men did not live during the mesozoic era.
Kentucky contains Mammoth Cave National Park which is the world's longest cave system. (Visit it. IT IS AWESOME.)
Odysseus and his men walked into the cave during the day.
In Emerald, TM07 Hail is found on the ground of the Ice Room in Shoal Cave. Shoal Cave is located along Rt 125 North of Mossdeep City. To access the Ice Room, you need to visit the cave during low tide, which occurs between 3am-9am and 3pm-9pm.
They hide in a cave in both the movie and the book.