A sprawling maze of used books piled from floor to ceiling.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

This collection features more than 240 antiquarian maps from around the world, in addition to historical views and plates focusing on North Florida.

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

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

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

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

Visit the monolithic tomb of America's most famous general.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Elevated freight railway turned wildly successful urban park.

A eight-foot-tall statue resides in the heart of Pennsylvania anthracite coal country.

Constrained by time and topography, this civil engineering landmark was constructed 100 feet above Starrucca Creek over the course of a single year.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

This massive sycamore tree has been labeled as one of the largest in the state.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

A daily replay of the experiment that proved the rotation of the Earth.

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

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Considered by many to be a local landmark and treasure.

Construction uncovered this trove of fossils, which visitors are welcome to add to their own collections.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The 32nd president's sprawling cottage sits on an island enclave jointly managed by the U.S. and Canada.