Places callan726 Wants to Go

The only castle in North America to ever house European sovereigns.

A gargantuan crystal kingdom.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

The Rio Lerma (Chignahuapan) in El Salto, Mexico, is one of the most polluted rivers in the world. It’s covered in white foam, and falling in can kill.

Mexico's astounding mummy museum with "the world's smallest mummy."

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

A giant Jesus statue watches over the city of Saltillo from the top of a mountain.

A massive underwater sinkhole made famous by Jacques Cousteau.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

This isthmus in the Bahamas narrowly separates the roiling Atlantic from the cool Bight of Eleuthera.

Cavernous opening completely encased in Karst limestone.

One of the deepest blue holes in the world.

They squeal, they nosh, they look like predators.

One of the most accessible undersea plane wrecks in the world.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

The final resting place of Christopher Columbus - or possibly someone else.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

The first official clock in North America, it kept time for the Spanish government of Santo Domingo.

The world's brightest bioluminescent bay.

This former sugarcane transport tunnel is now a portal to a lovely beach.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

The world's second largest single-dish radio telescope, once used to contact E.T.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.