This unusual lava tube spouts seawater during high surf.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The iconic remains of the original Academic Hall that burned down in 1892.

Two Ming Dynasty lion statues guard the entrance to the journalism school.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

A museum devoted to osteopathy and its creator, Andrew Still.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Giant granite rocks standing end-to-end like a train of circus elephants.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

Curious cave that stays a cool 56 degrees all year long.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

A one-stop shop for all things snowmobile, started by a snowmobile-obsessed group of friends in Wisconsin.

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

Where thousands of slaves passed through the "Door of No Return."

The souls of the dead have made these Ghanese crocodiles shockingly docile.

The historic cave is both a symbol of superstition and black magic and inspired one of the early Christian converts in Botswana.

Spanning over 10,000 square miles, this ancient salt pan is one of the largest on the planet.

This mosaic-covered bar is brimming with curated curios.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

Less a museum than a bizarre fantasy world created by artists and engineers.