Space is reserved in order of receipt of application. Applicants must be at least 21 years of age.
Final payment is due upon receipt of invoice.
Deposits are applied to the tour price and will be returned if space is not available. Participants are entitled to a full refund if written cancellation is received no later than March 30 . All cancellations received after March 30 are subject to a cancellation fee. If no stand-by participant is available, a further sum is not refundable if expenses already incurred cannot be recovered from service providers. The Smithsonian Institution accepts no responsibility for losses or additional expenses due to illness, weather, strikes, wars or other causes.