The world's oldest bookshop still in operation.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This star-shaped military outpost is now simply trying to protect itself from neglect.

The world's largest wooden structure.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

A private museum dedicated to preserving the heritage of Mardi Gras' most beloved underdog parades, open by appointment.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Home to the "Circus" trees created by Axel Erlandson.

An extensive collection of ancient Egyptian artifacts and mummies.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Dr Barnes' $25 billion private collection of art and arboretum.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

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

Akureyri is home to an oversized can of one of Iceland's favourite beers.

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

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

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

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.