This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The celebrated eyesore created by starry-eyed sweethearts.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Mysterious meeting place for UFO hunters near Area 51.

An eatery for UFO seekers on the Extraterrestrial Highway.

Yemen's "Stone Palace" looks like it was carved right out of the tall stone column on which it is built.

Rimmed by white crusts of salt on every edge, Lac Assal is one of the saltiest bodies of water in the world.

Mediterranean castle on a tiny Turkish island.

This super steep hike ascends 2,000 feet in less than a mile.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This former monument to an invented Iraqi victory was turned into a military camp during the subsequent invasion.

A bloody history is captured in this former prison turned museum.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

Just outside of Jordan's capital lies an ancient castle and intriguing caves dating back to the Copper Age.

Electrical pylon in the shape of Disney's beloved mouse.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.