First , you select the desired trip,either from the "Book Now" which u can find in the upper menu,or by selecting "book this trip" from the listing or an article.
Second , you specify first the month that u are coming.
Third , you fill in your details and you select the day you would like to do the trip from the calendar on the right.
Then you confirm your details and make the payment for the trip.
Thats it , by email you will receive your receipt and ticket for the trip.