The oldest military monument in the United States.

One of the earliest and best-preserved buildings in Charles County, Maryland.

Just outside the Naval Academy, Hell Point is a historical marker that could easily be the point where failed students wait for the bus.

One of only two sites in the United States containing the remains of Buddha.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

This Asian-inspired tower in a lush urban park provides spectacular panoramic views of Baltimore.

Historic barracks utilized during both the Revolutionary War and the Civil War.

A miniature city within a city, complete with traffic signs, signals, and streets to teach Baltimore's youth traffic safety laws.

A rural colonial settlement that contains the remains of a store and cooper.

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

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

One of the oldest standing structures in Montgomery County, Maryland.

This hidden treasure provides a charming access point along the south side of Baker Park.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

The elevator hidden in a smokestack on Roosevelt's yacht now serves as a monument to the former president.

The smallest covered bridge in Maryland.

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

FDR's Art Deco hospital tower was hopelessly inefficient.

This bell is one of the last remnants of the lost city of Triadelphia.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

This four-story steel sphere in Maryland was used to test biological weapons.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

A state park that once served as an important river crossing, and now offers protected lands for endangered plants and animals.

She stares out across six lanes of traffic, clutching a musket and infant with determination.