"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.

This hollowed salt dome is the largest oil storage facility in the world, hoarding 250 million barrels of crude oil.

A little-known hot spring haven right below the highway.

The man who was president for only one day and spent most of it asleep.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

An old abandoned pharmacy building in Texas is brimming with collectibles and images of the little tuxedoed pooch.

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

This historic church is named for abolitionist Henry Ward Beecher and the ruse to arm his fellow abolitionists.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

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

Recycling meets art in this colorful barricade.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A towering bronze statue memorializes the founding father of postwar American conservatism.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

A mythical chimera first sculpted in 1936 as a mix of the main animals of Texas livestock.

The most accurate timepiece in the world.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

A Texas landowner spelled out his name with three miles of trees, a giant signature that's been used by NASA to evaluate satellite imagery.

On a dusty county road sit the ruins of a ghost town's abandoned church.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

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