Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

This museum pays homage to a device that precipitated a watershed moment in Finger Lakes food production.

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

A castle built for love, and abandoned due to heartbreak.

Rochester's signature culinary delicacy.

The Binghamton area is home to six of the last remaining hand-carved vintage carousels.

This restored house is like a time capsule of the president's unconventional inauguration.

A giant steel sculpture with animals in its shadows.

A fictional town that was briefly brought to life before fading once again out of existence.

A gazebo that inspired the fifth episode of the "Twilight Zone" still stands in the creator's hometown

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Toxic waste disaster that founded the Superfund program.