Horse cemetery on the grounds of Blarney Castle.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

The trials and tribulations of marking Poe's grave.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Decades before the scandal, this staircase on the river was a literal "water gate."

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

Largest Roman Catholic church in North America.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

This former mining town was named the most toxic town in America.

A piece of John the Baptist in the American heartland.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

European castle ruins in an American state park are actually the product of death and grief.

Home to items never before seen by the public.

This historic railroad hotel built from Kansas limestone was once the most popular hotels for traveling salesmen in the midwest.

Journey up the capitol building's cupola for an amazing view of Topeka.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.