The walls of America's oldest masonry fort famously "swallowed" cannonballs.

The highest peak in the state of Vermont has some interesting features.

A fitting attraction for the corn capital of the world.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This Seattle museum displays the history of the telephone through an impressive collection of telecom equipment.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

Nuclear reactor created the plutonium used on Nagasaki.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

A subterranean house of worship carved right out of the bedrock.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

This micro-nation may be some sort of prank, but its constitution sure seems official.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

A little sculpture with a large wardrobe.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

The world-record holder for the longest bridge stretching continuously over water.

A map store filled with original Cold War era Russian maps of the world.

This playground sculpture of an icon from the past is dedicated to the children of the future.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.