A neolithic dolmen that was rebuilt after collapsing during the 19th century.

This simple stone monument honors a 19th-century tragedy.

This 1854 courthouse along the Mississippi River has a storied history.

This riverside restaurant has been serving customers since 1146.

A little-known hall almost completely covered in art by the beloved local painter.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

This breathtakingly beautiful botanical garden is home to a mob of wonderful wallabies.

This mosaic-covered bar is brimming with curated curios.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

Buy a token from the liquor store and you can make this beast spew flames on command.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

This unusual rock looks like a giant, otherworldly mushroom sprouting atop a cave.

This ruined 15th-century hermitage is steeped in myth and mystery.

A monument to the forgotten French explorers and their landmark expedition.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

The tiny statues form China's only known terracotta army from the Han dynasty.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

After years of slow decline, a derelict Gothic castle is now being restored to life.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

The enormous earthwork sculpture honors the ponies that lived and worked in the old colliery.

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

This Roman amphitheater is said to be King Arthur's legendary Round Table.