About Us

Guillermo Rivera is owner, operator and tour guide of Plant Expeditions (formerly Cactus Expeditions and South American Nature Tours).

Before starting his career as a habitat guide, Guillermo obtained his PhD in Botany and was a researcher at the University of Cordoba, and was employed at the Cordoba Botanical Gardens.

Since the first tour in Argentina and Chile in 2001, our tours have expanded to over 10 countries, including Bolivia, Brazil, Ecuador, Madagascar, Mexico, Namibia, Peru, Socotra, South Africa, Singapore and Thailand.

Tours are typically 14-16 days, with some offering 1 week extensions (e.g. Kruger National Park, Galapagos, Manu National Park in Peruvian Amazon, a trip to Antarctica if logistics allow after Southern Patagonia tour)

Contact Us

Guillermo Rivera

Roque Funes 2691

5009 Cordoba



+1 941 447 2160

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Conditions of Travel, Deposits & Payment

Our tours are all inclusive tours. Tours include transportation, all accommodations, activities, and meals. They do not include international airfare (people join from all over the world), they also do not include gratuities, or personal items, and souvenirs. All prices are in US dollars.

An initial deposit/payment to guarantee your place is required (amount depends upon the tour - we will advise when you contact us to express your interest). In the event of cancelation by you, this deposit may be partially refunded, depending on the tour (some tours require many advance payments for hotels, transportation, guides etc.) and timing of your cancellation.

Please understand that places on tours are limited. If you must cancel, we respectfully request a minimum of 3 months’ notice. On a multi-participant booking, each person is charged a cancellation fee.

If you cancel your booking, we will impose cancellation charges as follows:

  1. Cancellations made 90 days or more in advance of the tour departure date will receive a 100% refund.

  2. Cancellations made between 60 and 89 days in advance of the tour departure date will receive a 75% refund.

  3. Cancellations made between 30 and 59 days in advance of the tour departure date will receive a 50% refund.

  4. Cancellations made less than 30 days in advance of the tour departure date will not receive a refund.