Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

This stretch of the ancient Roman road is preserved in a valley that witnessed many battles and legendary highwaymen.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

Many famous English poets including Elizabeth Barrett Browning are laid to rest at this Swiss-owned cemetery in Florence.

Drink wine handed out through a window as part of an age-old tradition.

The middle finger of modernity.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

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

This shop for all your super spy needs hides an educational secret.

France's national museum of scientific and industrial instruments.

A speakeasy takes on Chicago's drinking culture.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

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

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Its interior is adorned with some of the best examples of early Christian mosaics.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.