The first trip of next summer departs May 30, with more dates to be scheduled.

A millennium trip to Scotland will depart in the 20th century and return in the 21st.

The trip will depart in early January 2012, but exact dates have not been finalised and are subject to change.

In summer, trips depart about every two weeks.

Trips depart from Presidio on March 21, 24, 27, 29 and 31.

Trips depart at least once daily (at 11:00) with up to six sailings in high summer.

Trip departs in Las Vegas upon check out from the hotel before 12 noon.

Snorkelling trips depart at 09:00 daily and stop at five different sites.

The trip departs 11 December, so you'll be home in time to celebrate Christmas with a healthy glow.

The next trip departs on May 16.