A small structure built from used railroad ties honors the short term of America's 20th president.

One of New Jersey's oldest churches is a historical treasure trove.

A collection of massive stacked rocks in Texas includes a snarky note on the benefits of modern technology.

The petroleum industry brings you the joys of hydrocarbons and largest collection of antique oil rigs in the world.

A self-explanatory attraction allows fans to respectfully remember and honor a comedy legend.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

When you can't get to the Pacific, just go to Florida.

Almost half-way between the Equator and North Pole.

A statue honors the genius who allegedly first took a meatball and made it into a hamburger.

These unusual rooms on wheels are holdovers from the 1960s.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

This nine-story building is the oldest standing skyscraper in D.C.

The house where John Wilkes Booth conspired with his co-conspirators.

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

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

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

100 years later, they're still down there.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

A secret greenspace hides atop a Capitol parking garage.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

"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!”

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.