If you dial the number in this abandoned office window "Sam Spade’s" secretary will ask you to leave a message.

Mountain known by the Tillamook Tribe as "the place of the supreme deity."

The largest wooden building in the world now houses a fascinating collection of aircraft.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

Two massive rock outcroppings on the Oregon coastline.

This corn maze so big you may want to pack a lunch, and possibly a flaregun.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

Europe's official "zero-level," the equator of elevation.

Museum preserving torture methods from the past.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

The history and future of cannabis.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

Site of James Cook's historic observations of the 1769 transit of Venus.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

The stoutest tree in the world.

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

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

This beautifully deceptive waterfall is something far different from what it appears to be.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

A uniquely robust and historic look at Mexico's omnipresent dance with Death.