This Costa Rican topiary park is a surreal garden of unearthly delights.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

A natural swimming hole that was once a ceremonial center for Mayan priests.

These enigmatic ruins continue to vex archaeologists.

An important Mayan religious and trading center dating back to 200 BC.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

A massive underwater sinkhole made famous by Jacques Cousteau.

Walrus skulls and narwhal bones were found here while excavating a 900-year old church.

Small Island off the coast of Greenland.

The world's northernmost flowers cling tenuously to life on desolate Kaffeklubben Island.

A father built this one-of-a-kind house in the shape of his son's race car.

These egg-shaped buildings constructed by Jesuits house a quaint museum in the Andes.

This colossal structure and its accompanying angel often play tricks on the eyes.

The house of a former Argentinian president stands protected within a large glass case.

Are they the remains of a fallen hotel, or the final stronghold for escaped Nazis?

Crumbling crypts and overgrown graves rise just out of arm's reach in this forgotten Buenos Aires graveyard.

One family's mission to exemplify sustainability took on a whole new life as a surprisingly beautiful home.

This magnificent abandoned hotel has long been haunted by its Nazi past.

Mineral springs believed to hold therapeutic properties draw in visitors from all over.

A brightly colored natural bridge formed by mineral-rich hot springs high up in the Andes.

A toxic lake near a volcanic caldera that is home to flamingos and other life.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A bright little alley in La Boca is a part of tango history.