This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

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

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

The land is home to swimming ponies and a legendary 18th-century treasure.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

An astounding collection of medical specimens, including bits of President Lincoln.

One of the largest collections of Catalan literature and cultural materials outside of Spain, created by a community of 1960s expats.