A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

The oldest landmark of Toronto is a testament to shifting sands.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Lost subway station nestled beneath Toronto's busy commuter line.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

Visible from both land and sea.

Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

An unphotographable nightly march of tens of thousands of "fairy penguins" from sea to shore.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

The word 'wunderkammer' translates as 'wonder-chamber'. This Wunderkammer is both a museum and a retail store.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

A battle between nature and architecture in the Cambodian jungle.

This Cambodian riverbed is covered in ancient Hindu carvings both above and below the waters.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

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

Time-frozen department store of dangerous and dusty relics.

A forest of phallic offerings found in a quiet corner of a hotel car park.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

The lavish temple of the Cao Dai religion that includes Buddha, Mohammed, Joan of Arc, and Victor Hugo.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

This cavern was used as a hidden hospital and safe house during the Vietnam War.