The floor of this spectacular Baroque sanctuary is covered in memento mori.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

The world's northernmost aquarium looks like it has fallen over.

The great polar explorer is remembered in this far northern town, where he embarked on his final expedition.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

In Faroese legend, this sinister horse-shaped beast lures unsuspecting passersby only to drown them in the lake.

Located more than 600 feet beneath sea level, this tunnel boasts the world's first undersea roundabout.

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

A unique subway station where pillars evoke ancient civilizations.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

The memorial stands at the intersection of the rivers Morava and Danube.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A sculpture of the beloved author surrounded by characters from his fairy tales.

The world’s oldest military museum has remained largely unchanged since the last days of the Austro-Hungarian Empire.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

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

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

The beautiful baroque library of the Hapsburg empire.

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