Like Pennekamp, this is a protected marine environment where visitors come specifically to experience pristine coral reefs through snorkeling and glass-bottom viewing. Both require timed entry reservations and have strict capacity limits to protect fragile underwater ecosystems. The experience centers on floating above living coral gardens in crystal-clear tropical waters, with educational components about marine conservation.

This park protects extensive coral reef systems accessed through designated snorkeling areas and underwater trails, similar to Pennekamp's structured approach to reef exploration. Both offer glass-bottom boat tours, marked snorkeling routes, and educational programs focused on coral ecosystem preservation. The tropical setting and emphasis on marine life viewing through controlled access points creates a comparable experience.

Known as America's Galapagos, this marine sanctuary offers protected underwater experiences through kelp forests and rocky reefs, accessed via boat tours with naturalist guides. Like Pennekamp, it combines marine education with structured access to pristine underwater environments. The park regulates visitor numbers and provides guided interpretation of unique marine ecosystems.

This partially submerged volcanic crater creates a protected marine sanctuary accessed only by permitted boat tours, offering exceptional visibility and coral viewing similar to Pennekamp's pristine conditions. Both locations feature calm, protected waters ideal for snorkeling, with tour operators providing equipment and marine life education. The crescent shape creates a natural aquarium effect.

One of the world's few coral reefs accessible directly from shore, offering snorkeling experiences over pristine coral gardens similar to Pennekamp's glass-bottom boat areas. Both locations emphasize coral conservation education and provide structured access to living reef systems. The reef extends close to beaches, allowing visitors to swim directly over coral formations in protected marine park waters.