Some of the world's only freshwater seals live in one very special lake in Russia.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Underground monastery and fortress.

These Stalin-era industrial 'death traps' hang lifeless above the city

Small church on top of a huge rock column.

Celebrating the history of whiskey production during New Zealand's era of prohibition.

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

This amusement park brings a little slice of England to the heart of Kyushu.

A bronze kitty adorns the grave of the polar explorer who brought the original feline to the Antarctic.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A slice of central Asia in the middle of Berlin.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The fragmented remains of a massive public bath connected to the city's water supply.

A Roman calendar dating to the first century is tucked away in a small town alley.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

The singular ruins of a mysterious lost city.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

A barbarous band of serpents guard the bases of these Aztec temples.

These Nubian pyramids are strange and unique, even by pyramid standards.

Crumbling pyramids and temple ruins stand within the shadow of this sacred butte.

A steamer run aground near Bimini lives a second life as a playground for scuba divers.