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This is a rapid from the Guayabero River, formed among the walls of ancient rocks. After Cristales, this is the most visited place in the region and is administrated by the local community that lives there. The place is a kind of open-air archaeological museum with ancient petrogliphs visible during summer time. To travel there, you can contact ECOAMEN , the communal tourist organization.
Is it the River of Seven Colors? Or a more prosaic five? Guides toe the party line du jour of five: black, green, white, yellow, and bold ruby red. The plants (yes, plants, not algae) supply the red or green depending on the time of year, and the rocks and sand fill the whole spectrum. More investigative/imaginative/trifling travelers will find six or seven, though. The walk along/through the river is simply spectacular. With all the interesting rock formations, natural pools, rapids, and waterfalls, it would be a truly beautiful river even without the crazy red plants.
A reasonably short moto-taxi ride out of town, this river has a really popular natural pool with the townsfolk, who more or less all go here on Wednesdays. A nice river to swim in, have a picnic and hang out without spending a hundred dollars. This can be combined with seeing the sunset on the way back. If you are traveling alone try to find some other people to share the mototaxi and save money. If you go to Caño Cristales you don't really need to see Caño de Piedras in addition.
botanic garden
This is a private place in a near village (La Esperanza, 18 km from Down Town) for the recovery and the conservation of native plants and animals. The Garden is a farm, with 150 hectares recognized as a Civil Society Natural Reservation. It is possible to travel around the garden in horses or in some paths by foot. There is a Garden office in the town where some services are offered (tourism guidance, transportation, basic information about the region).