For decades, this waterfall remained hidden because of an artificial dam.

Designed to commemorate the founding of the first settlement in Delaware.

Sniff the Titan Arum's rotting flesh.

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

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Created by a local artist, these quirky sculptures each have their own names and personalities.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Rocky outcrops containing overhangs, caves, fissures, clefts, and alcoves that invite exploration and scrambling.

According to local history, this cast-iron canine was nearly melted down for bullets during the Civil War.

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

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

This museum is dedicated to a Hollywood icon.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

Time travel with sweets across history at this research-based candy store.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

A well-preserved quarry and six of eight continuous burning pot kilns used to make burnt lime and crushed stone are highlights of the self-guided walking tour in Fountain Rock Park.

An architecturally unique lighthouse that had to be lifted up and moved to avoid falling in the sea.