The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

America's first federal monument.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

Burke’s oldest cemetery also houses the victim of the county's grisliest murder.

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

This former Cold War missile control site played an important role in the creation of GPS.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

A lone historical marker off the highway and scattered debris are all that remain of this Cold War-era missile site.

Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

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.

The first memorial dedicated solely to the Black troops who fought for the Union.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

Washington's iconic carousel has a nice piece of Civil Rights history.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

World's largest college campus includes a wildlife sanctuary and a former movie set on more than 28,000 acres.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.