Avenue of trees planted by cosmonauts before their space departures.

The remains of a monument in the remote Kazakhstani desert dedicated to the only men to die in outer space, the crew of the Soyuz 11 rocket.

A pair of towering monuments commemorate two of Kazakhstan's greatest poets and philosophers.

This 100-foot tall tombstone memorializes victims of 40 years of nuclear testing in Kazakhstan.

Fascinating early attempt at a Jewish autonomous settlement.

Five mile wide circular ring of rock in the Russian Far East is a curious geological oddity.

The coldest city in the world.

A remote forest of stone pillars along the Lena river.

The world's second-largest excavated hole.

Stalin's prisoner-built rail line sits in ruin, never having a single car ride its tracks.

Site of the largest impact event to occur over land in Earth's recorded history.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Built on the foundations of an ancient Roman villa, the unique architecture of this castle on the Catalan coast was used as a set for 'Game of Thrones.'

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

This exaggerated sculpture resembles a well known feature of Vancouver:

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

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

Traditional 15th century Chinese garden in the middle of Vancouver.

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

One of the now-less-hidden floral gems of the "Emerald Necklace."

A carnivorous plant paradise in a serpentine bog.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

For a few short weeks in spring, this hiking path becomes a daffodil paradise.