Denmark’s never-ending bridge.

The San Andreas Fault spectacularly offsets this creek.

A floating cat sanctuary on an Amsterdam canal.

This precariously perched fortress was once ruled by a crow-worshipping baron.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

Spend the night in this formerly abandoned traditional Scottish village.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

The reconstruction of this prominent building fulfilled a long-written command.

This modern monument to pagan belief looks like it was transported straight from ancient times.

One of the most valuable palace-garden complexes in the eastern borderlands—and one of the most haunted.

A tunnel with windows, so you don't miss out on the impressive views.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The original place where water met land in the City by the Bay is outlined in brass.

A hidden three-foot-wide house separates these two regal churches.

Cool down and fill up after visiting Teotihuacán at this bar and restaurant in a deep, underground cave.