Tickets cannot be purchased for Saint Texel Castle as it is a fictional attraction.
The option to purchase tickets on-site is not applicable to Saint Texel Castle, as it is a fictional location. For real attractions, on-site ticket purchasing is common, although online booking is often encouraged or sometimes required, especially for popular sites or during peak seasons.
Real Texel attractions like Kaap Skil do allow on-site ticket purchases. However, checking the specific venue's website in advance for information on ticket availability, pricing, and potential online discounts is always advisable. Some venues might offer combined tickets or timed entry slots, which are best secured beforehand.