One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

There aren't too many operational funiculars around, but Pittsburgh has two!

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

This lakeside tower is the third attempt at getting a tourist destination to stick on the spot.

The Cape Cod house that whaling built.

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

Surrounded by lonely toys, this Massachusetts gravestone marks the final resting place of six children who were murdered by poverty.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

A quirky collection of outsider art made from automobile parts.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

In which a local geological marvel becomes a quaint roadside attraction.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

An eerie diorama that captures the majestic nature of a few prehistoric-looking beasts.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

This poignant display is now a memorial to these regionally extinct species.

This taxidermy scene brings the struggle for survival in the Indian jungle to a quiet corner of a Manhattan museum.

This morbid scene depicts the Darwinian drama of death on the African savannah.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

Here be dragons.