One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Home to items never before seen by the public.

Baroque celebration of the end of the Great Plague of Vienna.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A magnificent collection of imperial armor and weaponry.

The final resting place for the remains of 143 Habsburg royalty.

This elaborate towering structure was once famed for its revolutionary height.

The castle still holds traces of the abandoned Roman fort it was built atop.

Recently restored menagerie of Victorian-era beasts.

After years of slow decline, a derelict Gothic castle is now being restored to life.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

The world's largest frame offers spectacular views of the city's past and present.

No building in the world leans as far as the so-called “Leaning Tower of Abu Dhabi.”

Whitewashed mosque contains the world's largest carpet.

This historic observatory contains the world's oldest refracting lens telescope.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

"Iron Age" creatures fill this huckster's rusted metal sculpture garden.

A graveyard that dates back over 200 years stands near a busy shopping center.