The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

The unbelievably opulent home built for an infamous newspaperman.

A Cajun-style Christmas on the river also involves sky-high pyres and explosives.

New Orleans' famous cemetery, located on the site of a former race track.

Dive bar built out of the remains of a whaling ship.

This amazingly preserved Gold Rush town is a historian's dream.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Travelers exchange letters with woodland creatures at this mini post office.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

Op-art architecture designed for happiness.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

Come for the flowers, stay for the bats!

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

A modern mechanical planetary system, part of a 10,000 year clock.

One of England's most famous churches hides a pair of little known architectural treasures.

This skewed English house has looked like it's going to fall over for centuries.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Regency-era excess on the English Coast.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

The world's second-largest sundial, made entirely out of stone.

Scholar, adventurer, saint, and instigator of the Goa Inquisition.

Two thousand artifacts from around the world collected by one woman who loved to travel.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

Turns out you can see the world without ever leaving Maine.