Topped by a distinctive beehive dome, it’s been called by architectural historians and locals, “Brooklyn's Sacré-Cœur.”

Half-scale model of a historic ship in the children's section of Provincetown Public Library.

An historic lighthouse accessible via a half-mile walk through a nature preserve and freshwater tidal wetlands.

Wedged between streets and buildings, this ancient Roman theatre could seat 7000 spectators.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

One of the best views of the city is tucked away at the top of a water tower.

The longest and widest floating bridge in the world.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

This 820-foot-high spiral ramp is a walkway to the sky.

The historic tall ship is one of just three of its kind still sailing open waters today.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

This modest span in an industrial neighborhood is one of only four retractile bridges in the United States

Drink wine handed out through a window as part of an age-old tradition.

One of the world’s largest suspended aquariums, located in Dubai Mall.

An Outer Banks museum devoted to the thousands of shipwrecks resting off North Carolina’s coast.

America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

From this scenic rockface, you can still see the paths Western pioneers followed.

Historic seaside park featuring explorable, abandoned military structures.

Some big-name visitors have patronized this small-town library named for an oil man's daughter.

This 19th century wooden span is one of only four retractile bridges in the United States.

One of the last Jazz Age "Wonder Theaters" in New York City.

This is the last surviving Bollman truss bridge in the world.

This stately brick building once provided supplies and equipment to lighthouses across the northeast during the 19th and 20th centuries.