This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Located in a Civil War era building, this café is engrained with the spirit of Edgar Allen Poe.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

These statues pay homage to the "green corridor" of parks and wetlands.

The city is full of whimsical portals to another world.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

Canada's largest dinosaur skeleton was hidden away in storage for more than 40 years.

This whimsical fountain pays tribute to Toronto's four-legged friends.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

An unusual college football tradition involves burying pieces of sod from competitors' turf, replete with tiny coffins and headstones.

World's largest magnetic research facility.

This state park was once an important Native American cermonial center.

Opened in 1976, this monster-sized version of the fast-food franchise is sometimes called the Epic McD.