Martz Sink
Certified cave and cavern diving only: Florida State Parks diving rules [2] (Park-wide rule; no site-specific category published for Martz Sink.). 以下分类采用该认证体系自身的命名方式，用于描述该潜点所需的培训级别。
A sinkhole in Madison Blue Spring State Park that Florida State Parks describes as a way for trained cave divers to enter the Madison Blue cave system.
Florida State Parks mentions Martz Sink as a place where cave divers can descend into the Madison Blue cave system, and stresses that specialised cave training is essential. The same park rules apply as at the main spring: certified cave or cavern divers only, teams of two or more, and dives finished an hour before sundown.
The park pages give no depth, size or directions for the sink, so check with park staff on arrival.
环境
A sinkhole opening into the Madison Blue cave system; no published measurements.
通往该地点的其他入口 Madison Blue Spring cave system
仅供方位参考，不可用于导航。空心圆点为大致位置。
本页所有信息及其来源 (5)
| 信息条目 | 状态 | 来源 |
|---|---|---|
| Florida State Parks invites trained cave divers to descend at Martz Sink into the park's cave system and requires divers to work in pairs and finish at least one hour before sundown. | 已核实 | [1] |
| The park is open to certified cave and cavern diving only. | 已核实 | [2] |
| Park rules require sign-in, at least two divers, diving within certification, no DPVs, and completion one hour before sunset. | 已核实 | [2] |
| Park admission is $4 to $5 per vehicle.Read 2026-10-14. | 已核实 | [3] |
| The park is open from 8 a.m. to sunset.Read 2026-10-14. | 已核实 | [3] |
已核实：来自我们直接查阅的官方或主要来源。已报告：仅来自二手来源。来源存在冲突：注释中列出两种版本。可能已过时：我们找到的最新来源已有一定年代。
由我们根据上述来源以自己的文字整理撰写。 提交更正