Most small-molecule neurotransmitters are stored in small vesicles that range from 40 to 60 nm in diameter and, in electron micrographs, appear to have clear centers. The vesicles that store neuropeptides are larger, ranging from 90 to 250 nm in diameter.
The world's largest concentration of natural sandstone arches. 1  Hike the 1.5 mile trail leading to the base of Delicate Arch to experience one of the most breathtaking vistas in the world. 2  Your family will love the short trails in the Windows Section that lead right up to several massive arches.
Arches National Park. Behind the Arches National Park visitor center, craggy sandstone rises like a castleâs curtain wall between towers and turrets. The 40-mile scenic drive climbs high onto the plateau and crosses a vast and glorious landscape of panoramic views with distant snowcapped mountains.etâs get hiking. Itâs no surprise that Arches National Park is one of the top national parks in America: itâs a 73,234-acre wonderland of eroded sandstone fins, towers, ribs, gargoyles, hoodoos, balanced rocks, and, of course, arches northwest of Moab.