And Simon Murie, founder of niche tour operator Swimtrek, says the Strait of Hormuz (Oman-Iran), Gulf of Aqaba (Egypt-Saudi Arabia) and La Perouse Strait (Hokkaido, Japan - Sakhalin, Russia) are all waiting to be swum.

BBC: What adventures are actually left?

"Direct transport links are something people on both sides of the strait want, and the earlier the better, " says K.W. Nieh, an EVA Airways senior vice president.

CNN: Deal-Making Time

While travelling through the narrowest part of the strait, all fighter jets on the carrier were grounded, our correspondent says, but US Navy helicopters flew above the carrier.

BBC: USS Abraham Lincoln in Strait of Hormuz voyage