Chernobyl Exclusion Zone, Ukraine: – The site of the 1986 nuclear disaster. While guided tours are available, strict safety measures must be followed.
Fukushima Daiichi Nuclear Power Plant, Japan: – The site of the 2011 nuclear disaster. Access to certain areas is restricted due to radiation concerns.
North Korea: – Travel to North Korea is highly restricted, and visitors are only allowed on guided tours. The country is known for its closed-off nature and strict control over information.
Snake Island, Brazil: – Ilha de Queimada Grande is home to a highly venomous snake species. Visits are restricted to scientific research only.
Svalbard Global Seed Vault, Norway: – While the seed vault itself is not a tourist destination, the remote location and harsh Arctic conditions might not be suitable for casual visits.
Mount Sinabung, Indonesia: – This active volcano has erupted multiple times in recent years, posing a danger to visitors.
Mogadishu, Somalia: – Ongoing conflict and security concerns make Mogadishu a high-risk area for travelers.
Centralia, Pennsylvania, USA: – A town abandoned due to a coal mine fire that has been burning since 1962. While it's not illegal to visit, the area is dangerous due to unstable ground.
Mafia Island, Tanzania: – Despite its idyllic name, Mafia Island is prone to malaria, and travelers are advised to take necessary precautions.
Poveglia Island, Italy: – Known for its dark history, including being a quarantine station during the plague. Access to the island is restricted.