Highly spherical boulders on the shores of New Zealand.

The glacier tucked within a New Zealand rainforest.

This strange geological landscape erupts with sudden bursts of water.

This electric green sulphur lake in New Zealand looks like a cartoonish radioactive dump site.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

Tubing through a cave lit with glowworms is a magical underground experience.

A glacier pocked with ice caves and surrounded by rainforests.

A perfect turquoise lake colored with glacier dust.

Come for the flowers, stay for the bats!

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

A condom-covered Thai restaurant that is more concerned with birth control than food.

The world's largest impact crater is mainly eroded but still remembers the planet's violent history.

Home to some of the oldest hominid fossils ever found.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Resting place of Hollywood's immortals is also site of summer film screenings.

America's most famous piece of self-built architecture.

World's largest collection of serial killer artwork and other macabre exhibits.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

Connecticut's shot tower is near the end of its life.

An extra-wide chair built to accommodate the former president's big behind.

Underground tunnels remain beneath this abandoned mental asylum.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.