A papal fortress built to assert Roman control over the independent city of Bologna

The official portrait of California's longest-serving governor has been likened to "spilled ketchup and soy sauce"

This giant, unfinished suburban cathedral was meant to be the Canadian seat of the Slovak Greek Catholic Church

Tombs containing the remains of some of the first and most important professors of medieval Bologna

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol. 

Behold the uncanny sight of the Golden Arches—rendered in black.

A centuries-old stone pagoda from Japan stands among cherry trees beside the National Mall Tidal Basin.

A battleship’s mast sits atop a turret-like memorial, commemorating those who lost their lives in one of the precipitating events of the Spanish-American War.

A memorial dedicated to the famed North Pole explorer appropriately sits at the far edge of Arlington National Cemetery.

Home to the first child born to English colonists in North America, this colony mysteriously disappeared while waiting for supplies.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Resting place of Hollywood's immortals is also site of summer film screenings.

Eighty million natural history specimens call this gargantuan museum home.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Historic Lee family homestead built in 1785, later serving as a private home and a Civil War hospital.

Richly symbolic public artworks that have been reconfigured for the 21st century.

Perhaps the most storied New York City eatery, Delmonico’s reshaped American restaurants.

Northern Virginia’s iconic Vietnamese shopping center.

This library is designed to commemorate the work of the Human Genome Project.

Odd castle-like structures for collecting water sticking out of the Mississippi River.

A Manhattan tombstone honors a popular 19th-century heroine, now long forgotten.

Situated in a bustling intersection, this "mobile" monument that honors local veterans from five different wars has moved several times but appears to have found its final resting place.

This lifelike sculpture of a policeman serves as a helpful reminder to watch out for crossing pedestrians.

Locals dubbed it the "Owl Building" because of its bird-like appearance.