The largest axe on the planet contains a time capsule that seems like it may never be discovered.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

The library of every book lover's dreams.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

Homemade rockets, dinosaurs, and robots make this New York small business much more than a furniture store.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

A failed piece of Orientalism has become the proud symbol of a community.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Twice a day, the water of the Petitcodiac River flows upstream in a surfable wave.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

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

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

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

Wine bottle sculpture with a ship's stateroom inside.

Visit the site of a subway powered by nothing more than air--and lots of it.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Compensation for the destruction of a historic shipyard.

A winding, cliffside stretch of road overlooking the Delaware River.