Built for an exposition in 1915, these horticultural displays have stood the test of time.

A second generation sun-powered marvel lights up the night.

One incredible room in the Santa Barbara Courthouse is covered in wall-to-wall canvas murals.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

An underground magnet for ever-changing street art.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

A 30-foot-tall cement chair pays tribute to a historic design and a local industry.

The partial realization of a utopian proposal to build a master planned community primarily by and for Black Americans.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Memorial stone for GWAR vocalist, depicted in his iconic costume.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

A tiny survivor of the Donner Party disaster.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

Oldest building in California still in use.

A hidden courtyard houses early 20th-century plaster masterpieces.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

Once America's tallest structure, now a Baltimore landmark.

Public opinion is still divided on this enormous sculpture in front of Baltimore's Penn Station.