This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

After much poking and prodding, this island is decidedly not a magnetic anomaly, but it sure is pretty.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

The UFO capital of Australia is the outback’s answer to Roswell.

Clusters of huge boulders in the Australian Outback.

Visitors can swim with vicious predators in Crocosaurus Cove's plastic daredevil enclosure.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The site of the climactic scene from the classic horror film is now a historic landmark.

The "lovely red Vega" of the legendary record-settling pilot.

Over 120,000 curious objects that have shaped our modern world.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Part bookstore, part café, and part forest.

The only castle in North America to ever house European sovereigns.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

A dilapidated dock tells the story of Titanic's missed arrival.

An artist's cute bronze subway sculptures belie his violent artistic past.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

The Boston square dedicated to the dark poet who was born nearby.