The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

You can cross from one country to another in a single hop on this little bridge.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

This marker identifies the location where three states converge.

This small piece of Michigan is entirely surrounded by Ohio.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

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

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

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

The celebrated eyesore created by starry-eyed sweethearts.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

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

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

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

The 18th-century home was disassembled into 253 cases and brought all the way from the other side of the world.

This historic tall ship traveled 1.5 million miles around the globe, and once did duty as the mythical pirate ship in Peter Pan.

The holes in the world's longest golf course are in a series of different towns.

Fiberglass fish built in 1968 after months of fundraising.

Taxidermy of the racing horse with a huge heart, who inspired hope in the Depression.

These mythological giants take time out of their busy day guarding a Victorian market to let you know what time it is.

This giant dish located in a sheep paddock was the primary receiver of Apollo 11 TV transmissions.

The longest fence in the world stretches over 3,000 miles to keep the dingoes out.

The once-dying town of Sheffield, Tasmania has reinvented itself as a village of painted wonders.