A room hidden behind a swinging shelf in the children's section.

One of the largest underground systems runs under Canada's largest urban center.

A 19th-century architectural wonder designed by the "father of the skyscraper."

The site of Paul Revere's historic two lantern warning.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Numerical symbolism abound at East Asia's oldest observatory.

A Korean village where times stands still.

This structure among the trees was the result of divine inspiration.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

This giant roadside goose has been hailing travelers into a small Ontario town for over 50 years.

Ruins of a once-prized railroad station in New York.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

The seat of Buffalo government is a gorgeous Art Deco palace.

A natural gas leak provides a flickering flame beneath a waterfall.

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

What remains of the simple red brick chapel where the women's rights movement began.

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