Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

A fernery hidden by neglect is uncovered, and an ancient specimen along with it.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

The homestead of American patriot John Adams.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The glacier tucked within a New Zealand rainforest.

Dedicated to an "Unknown Man," this grave holds either the remains of a lovelorn suicide or a Cold War spy.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

The first safe in this California town had to hold all the gold.

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

This famous city eluded concrete detection until the early 2000's.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

An old whaling station now serves to give the public a look at the commercial whaling industry, no longer a part of Monterey's economy.

Museum dedicated to the terror regimes of Hungary.

This remarkably simple jail went over a century without an escape.

The site of a tragic massacre that spawned a multimedia franchise.

A subterranean house of worship carved right out of the bedrock.

A collection of collections ranging from dentistry to minerals.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.