Once in a state of dilapidation, this candy-inspired fortress is now being revived.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

A collection of artifacts from Maryland's maritime past.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The creek where a shark wreaked terror upon New Jersey, and served as the inspiration for "Jaws."