Update (June 23, 4:20 p.m. ET): Due to the popularity of this package, all $1999 per person dates are now sold out. Sept. 12, Sept. 13 and Nov. 7 are still available at $2099 per person.

Explore two of the world's most ecologically rich islands with a $1999 per person Galapagos vacation.

This exotic six-night package, with four nights on Santa Cruz and Isabela islands, is $600 less than competitors’ tours -- which only offer three nights on the islands. Plus, Friendly Planet's small tour groups (16 people or less) are led by naturalist guides and local guides.

Snorkel with white-tipped reef sharks, hike amid lava fields, and see rare species such as blue-footed boobies with this trip, which includes:

• Roundtrip air to Quito, then Baltra
• Four nights at the well-reviewed Red Mangrove divers lodges
• Two nights at Quito's 4-star Hotel Sebastian
• Four days of tours on the islands
• 14 meals: breakfast daily, four lunches and four dinners
• All transfers and bag assistance
• Galapagos entrance, visitors card fees ($110 value; not included in competitors' trips)

Optional extension: For $229 more per person, stay an extra night in Quito and get tours of the Otavalo market, Mitad del Mundo (monument to the equator) and the city's historic district.

Travelzoo Tip: "Like" Friendly Planet on Facebook to get an additional $25 off per person, per booking for this trip.