They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

A monument marks the beginning of the longest north-south road in the United States.

This historic mansion was built as a symbol of love between a husband and wife.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A Museum Dedicated to the Heroes That Fight Fire.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

One North Dakota man's vast collection of rare rocks, polished orbs, and geological wonders.

This museum is a full-size replica of an original church constructed during the 13th-century.

These former Cold War launch sites have been preserved for tourists to see where the button might have been pushed.

This metal shop's yard is filled with cutout art including an Eiffel Tower replica and Noah's Arch.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

A 115-year-old restored German dining hall awaits those who venture beneath the Minnesota State Capitol.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

This pun was simply waiting to come to life, and one defense contractor made it so.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

This massive airship factory is so large that it has its own indoor weather.

The time thousands of bags of chips washed ashore in the Outer Banks is memorialized in a local museum.

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

See six states, pickled freaks, rocks, and antiques.

This naturally-sourced hot spring is now home to a clothing-optional resort.