Can taxi fares to tourist attractions be reimbursed during the conference?

No. Travel to tourist attractions is purely for personal travel purposes and has nothing to do with work. These expenses are generally not considered travel expenses and therefore cannot be reimbursed. If you participate in work-related activities such as business meetings or seminars, and the trip to tourist attractions is for work purposes (such as inspecting competitors), you can include taxi fares as travel expenses and be reimbursed.