A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A clone of a cloned tree that was so important it allegedly had its own guards.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

The Forest Service's surprisingly sophisticated collection of wildfire prevention art features America's most beloved bear.

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

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

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