His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

Roam the cradle of the Cuban Revolution with life-sized dinosaurs.

Home to what locals claim is the largest whale skeleton in Southeast Asia, which is worshiped yearly.

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

Have fun at the world's first Buddhist waterslide park.

A palace destined to never house a king.

5,000 skulls in memorial to those killed by the Khmer Rouge.

This plaque tells the story of an event that took place in an imagined parallel universe.

This mountain fissure hides a secret path to a secluded mossy grotto within the rock itself.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Climb right into the heart of this colorful Iceland volcano.

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.