Besides being home to cave paintings and pre-Columbian Cuban archaeological remains, you get to take a boat through this stalactite and stalagmite covered cave.

A Mayan village preserved for centuries in volcanic ash.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

A turquoise lake within a volcanic crater.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

The Andean town where every single building is decorated with a brightly colored frieze.

This stone complex marks the urban center of a lost civilization.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Huge stone depressions which may have acted as an Incan agricultural experiment.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This curious fresh and salt water lake holds a secret that draws in deep divers from around the world.

Bohol's unusually shaped hills turn brown in the summer months.

Singapore's oldest Hindu temple.

After a 2004 tsunami, this stranded boat was left in place.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

This park in Nagarkot boasts one of the best views in all of Nepal.

The oldest Hindu temple complex in Nepal serves as the seat of Nepal’s national deity, Lord Pashupatinath.

Dating back to the fourth century, it's the oldest Hindu temple still in use in the Kathmandu Valley.

Jumping-off point for a climb up Mt. Everest is the most dangerous airport in the world.

Towering at a height of over 30 meters, this turn-of-the-18th-century landmark is the tallest temple in Nepal.