The remains of Crystal Palace Great Exhibition of 1851.

A relic of Victorian grandeur hides beneath a busy South London road.

Abstract dinosaur models in London.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

Rebuilt remains of a temple to Roman god Mithras.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A student driver's nightmare.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

One person's lost luggage is another person's treasure.

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

Canadian centennial project designed to gather information about UFOs.

Watch bison, elk, and other wild animals up close at this national park.

This unique bridge has been a staple across the Saskatchewan River Valley for more than 100 years.

This is one of the last remaining theatres in Canada to feature an Art Moderne architectural style.

An outdoor installation of 20 vintage signs that once hung in front of businesses throughout town.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.