Gruta do Lago Azul
The entrance to Bonito's best-known show cave, a protected Natural Monument with a blue underground lake where divers found Ice Age mammal bones in 1992. Visits are guided walks; no public diving offer was found.
Visitors enter through a circular opening about 40 m across and walk down a steep chamber towards the lake on guided tours. The lake itself is not open to visitors in any source reviewed: the 2012 state order covered contemplative visits only.
The site matters to cave diving for what divers found there. In 1992 Brazilian and French divers recorded bones of extinct Pleistocene mammals on the lake floor, and the lake hosts cave-adapted aquatic life, including the blind crustacean Potiicoara brasiliensis.
환경
A large, steeply sloping dry chamber ending in a still, clear underground lake. A 2002 report gave the lake as 90 m deep. Sunlight strikes the water in part of the year, turning it an intense blue.
컨디션
Light effect on the lake is strongest from about September to February according to a 2021 report; other sources give different months and morning hours.
현재 상태가 아닌 공개된 자료의 일반적인 범위입니다.
시설
Guided walking route into the cave. Showcaves.com lists tours of about 90 minutes and no entry for children aged 0 to 4 (data from 2000 to 2020).
이 페이지의 모든 정보와 출처 (9)
| 정보 항목 | 상태 | 출처 |
|---|---|---|
| The entrance is circular and about 40 m across. | 보고됨 | [3] |
| The underground lake is 90 m deep.Single 2002 figure; no survey found. | 최신 정보가 아닐 수 있습니다 | [4] |
| In 1992 Brazilian and French divers found Pleistocene mammal bones on the lake floor. | 보고됨 | [4] [5] |
| The 2012 IMASUL order authorised contemplative visits only, capped at 305 visitors a day in groups of up to 15 with a guide, and does not mention diving.Authorisation ran to 2013-12-31; later visitor rules are in the 2022 management plan, which could not be read for this record. | 최신 정보가 아닐 수 있습니다 | [1] |
| IMASUL approved the monument's management plan on 12 July 2022. | 확인됨 | [2] |
| The federal government authorised ceding the cave to Bonito municipality for 20 years in January 2021, with the municipality managing visits. | 보고됨 | [3] |
| Visits required a registered local guide, a voucher único, a helmet and closed rubber-soled shoes under the 2012 order.2012 rules. | 최신 정보가 아닐 수 있습니다 | [1] |
| From September to February sunlight on the lake turns the water an intense blue.Showcaves gives about 07:30-09:30 each morning; FAPESP (2002) gives December and January. | 보고됨 | [3] |
| Showcaves lists guided tours of about 90 minutes and no entry for children aged 0 to 4.Reference data dated 2000-2020. | 최신 정보가 아닐 수 있습니다 | [5] |
확인됨: 직접 열람한 공식 또는 1차 출처에서 명시된 정보입니다. 보고됨: 2차 출처에서만 확인된 정보입니다. 출처 간 상충: 비고에 두 가지 내용이 모두 기재되어 있습니다. 최신 정보가 아닐 수 있음: 확인된 가장 최근 출처가 오래된 경우입니다.
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