With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

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

A historic neighborhood church is reborn as a psychedelic arts collective.

A nostalgic bibliographic gem.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

The most accurate timepiece in the world.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Memorial stone for GWAR vocalist, depicted in his iconic costume.

This is one really big nut.

Bizarre Cavern.

A monument marks the location of the first successful steamboat demonstration.

This general store is more than a century old and home to various oddities and antiques.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

These figures float and flutter in this fountain crafted by famed Swedish sculptor Carl Milles.

This eye-catching sculpture of rural life seems a bit out of place at a suburban intersection in front of a car dealership.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

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

This train station inspired the name of a 1970's rock band and provided the backdrop for their album cover.

Where pardoned turkeys once spent their all-too-brief final days.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.