This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

This colonial town in Colombia sits around the largest stone paved square in South America.

This small bridge serves as a symbol of South America's independence.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

This giant temperature attraction created some giant electric bills.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A historic lighthouse steeped in rumors of ghost and pirate stories.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

The ruins of a town wiped out by the second-largest earthquake in recorded history.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

This colorful gate stands as an entrance to the walled city of Old San Juan.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

Children's literature inside, forest all around.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Old Danish castle immortalized in Shakespeare's Hamlet.