Nature's biggest mammal swims in landlocked Oklahoma.

The world's largest aggregation of great white sharks is at a mysterious spot in the middle of the ocean.

Vietnam's largest Buddha statue depicts a female sage.

Marikina's record-breaking loafers.

Climb to the top of the world's largest seated bronze Buddha.

This top secret Chinese military megaproject is the world’s largest human-made tunnel structure.

The world’s largest work of glass art hides in this stunning Taiwanese subway station.

The world's largest statue of Mao Zedong looks out over the city where he discovered Communism.

A part of the world's largest marsh seems to be growing bright red Martian grass.

Tirelessly maintained by a Wisconsin man named JFK.

Canada shows its hockey pride with a giant stick.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

One of the world's largest salt caves is filled with fragile salt sculptures, salt rivers, and huge salt megadomes.

The longest hedge maze in the world.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The state bird of New Mexico, constructed entirely out of garbage.

Recycling meets art in this colorful barricade.

Thousands of mounted insects, and some live ones, hide within an otherwise ordinary shopping mall.

Albuquerque found the perfect use for tumbleweeds at Christmastime.

The U.S. Air Force has an anti-satellite laser weapon.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.