The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

These elevated trucks were put in place as a middle finger to The Man, but are now considered folk art.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Pilgrimage site for star-crossed lovers.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The Renaissance-era courthouse is a relic from the fortified town's centuries of Venetian rule.

One of the shortest streets in York has an especially odd name.

This network of narrow, medieval passages has the most delightful name.

Follow the original medieval paths that wind through this intriguing section of the city.

A century-old tradition has culminated in a small but singular collection of feline effigies.

The West's first incursion into the Afghan world lies buried beneath a military base.

These unusual rooms on wheels are holdovers from the 1960s.

The romance of early commercial flight still fills this Art Deco destination.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

The "lovely red Vega" of the legendary record-settling pilot.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Home to items never before seen by the public.

This Portland Art gallery doubles as a studio that supports adults with intellectual and developmental disabilities.

The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.