This 18th-century former mosque held the first Hellenic Parliament.

This cave complex might provide a link between the Neolithic and the Classical Greek period.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

A museum dedicated to exhibiting remarkable outsider art.

This striking art museum holds an amazing series of curiosity cabinets.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

Curious cave that stays a cool 56 degrees all year long.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

The iconic remains of the original Academic Hall that burned down in 1892.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Sniff the Titan Arum's rotting flesh.

Ride the subways of yesteryear.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

This historic hotel invented the chocolate brownie.

The beloved home to all publications indie, erotic, and punky.

A Bibliophile's Dream.