The world's largest woodcarving collection includes dozens of Bible scenes and a wooden bestiary, all carved by one man.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

‘Bush the old fire dog died of poison July 5th, 1869. RIP.’

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

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

The span is crooked and made from two older recycled bridges.

There's a crumbling old mansion inside the Smithsonian National Zoo.

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

Before Nixon, "watergate" meant canals.

This poor little statue is the most vandalized memorial in Washington.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

A historic ruin just 20 feet away from a busy highway onramp.

People escaping slavery may have hidden inside a corpse vault.

A painfully obvious spy house sits right across the street from the Russian Embassy.

The most decorated dog of World War I is preserved in the Smithsonian.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

Direct, creative challenge to Mother Nature's winter wrath.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This Los Angeles animation studio is keeping the wonder of stop motion puppetry alive.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.