The elevator hidden in a smokestack on Roosevelt's yacht now serves as a monument to the former president.

The only one-room schoolhouse remaining in Talbot County, Maryland.

This statue of two men in a rowboat was erected to honor those who died while fishing in the Chesapeake Bay.

The first marker along the famous boundary.

A rural colonial settlement that contains the remains of a store and cooper.

The longest-covered bridge in the state of Maryland.

This historic lighthouse was well known for the large number of women who served as its keeper.

Unusual house, in an unusual neighborhood, home to some very unusual peanuts.

This unassuming North Austin neighborhood was built to test the novel idea of home air conditioning.

A former electrical substation is now home to an eccentric junk art masterpiece.

A grove of colossal man-made flowers built to collect the sun's rays.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

Dedicated to a U.S. Army lieutenant colonel who was also a bird watcher and artist.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

The U.S. Fish Commission’s effort to mass produce carp.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

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

The rogue roots are gradually consuming some of the historic marble grave markers.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

The hippo that stands on this university campus was once a drunken flea market purchase.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

Stand at the center of this lakefront sundial, and you'll become part of the timepiece.

Cryptid lake monster honored with its own monument.