The oldest U.S. Government building in California, and it's State Historic Landmark #1.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

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

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

Medicinal spa created with the discharge from a geothermal energy plant.

An encyclopedic collection of mammal penises.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A curious collection of locks and keys.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Turning night into day in Victorian-era Austin to thwart a serial killer.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

There must be a pun in this haystack somewhere...

Set sail on a small scale.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.