These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

A six-story-tall golden pyramid, surrounded by a moat.

This observatory comes complete with three separate telescopes and a dedicated community of amateur and expert astronomers.

Robots, lasers, and whoopee cushions, oh my!

One of Frank Lloyd Wright's final works was this UFO church.

This holy goods emporium is where priests go for a little retail therapy to outfit their churches.

Complex aquaponics systems allow fish and plants to grow in harmony.

A bedazzled house and crown "jewel" of outsider artist Loy Allen Bowlin.

The home of 1.5 million wood letters for printing is still a functioning workshop.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

House built with over 60,000 glass bottles.

Full-sized barn houses many restored instruments.

Annual convention held by the largest pyrotechnic community in the world.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Take a drunken tour inside the world's largest known geode.

Stunning views over Ontario's old-growth pine forests.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

A neutrino detector built into the largest man-made underground cavity in the world.

This cave holds a surprisingly colorful variety of geological oddities.

Profile of a sleeping person 4km long in 250m high cliffs.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

The first hand-illuminated, hand-written bible since the invention of the printing press.

A Norwegian church that was built before Wisconsin was even a state has been entirely moved to a nicer spot.

1887 era Russian Orthodox church in Minneapolis.