One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

An enormous, inside-out glass globe built in 1935.

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Established in 1925, Kiddie Park claims to be the oldest amusement park in the U.S. - a cozy little time warp nestled in a shady corner of the modern world.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

A popular swimming hole that hides one of America's most deadly diving spots.

A high-octane shrine to the greatest Texans who ever lived.

A small island hides in plain sight on Austin's Lady Bird Lake.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

A grove of colossal man-made flowers built to collect the sun's rays.

A hotel and restaurant serving as the mecca of kitsch.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

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

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

The Grand Canyon of Texas.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The oldest working mechanical clock in the world.

Elevated freight railway turned wildly successful urban park.

Most-visited and most-photographed slot canyon in the American Southwest.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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