Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

The top of society once luxuriated in this world-class hotel, which continues to impress, even in ruin.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

This dark, damp, perilous tunnel is the only passage from north to south Tajikistan.

This town near Nagasaki is flecked with fruit-flavored bus stops.

The remains of what was, not so long ago, the world's largest city.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

A winding, blood-red tunnel of hardened lava navigable by foot.

Stroll through a wonderland of stupendous moss-covered trees.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

One native village in Bali lays their dead at the foot of a holy tree whose natural fragrance seems to hide the stench as the bodies decompose.

The summer tourists on these cliffs are thousands of seabirds.

Stunning examples of Russia's 18th-century wooden architecture.

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

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

Old cabin-like homes in a rural community untouched by time are known for their vibrant and colorful window shutters.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

A winding district gerrymandered into the shape of a mantis.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

This foolish Victorian sea fort was converted to a deluxe hotel.