The Southeastern Connecticut region comprises, as the name suggests, the southeastern corner of the state of Connecticut. It is sometimes referred to as New London County or by the tourist slogan Mystic and More.
Route 10 is a numbered state highway connector in the U.S. state of Rhode Island, traveling along the Huntington Expressway, the first freeway in the state. It connects Route 12 on the Cranston–Providence city line with Interstate 95 (I-95), U.S. Route 6 (US 6), and Memorial Boulevard in downtown Providence, passing just east of the Olneyville area of Providence. It provides an alternate route to I-95 south of downtown, and connects it with the US 6 freeway west from Olneyville towards I-295 and Connecticut.
Route 14 is a numbered state highway in the U.S. state of Rhode Island. It runs approximately 23 miles (37 km) from Connecticut routes 14 and 14A at the border with Sterling, Connecticut, to Route 6 in Providence.
Route 116 is a state highway running 25.1 miles (40.4 km) in Providence County, and Kent County, Rhode Island. Its southern terminus is at Route 33 and Route 117 in Coventry, and its northern terminus is at Route 114 in Cumberland.
Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running generally southwest–northeast through the US state of Rhode Island. It runs from the border with Connecticut near Westerly, through Warwick and Providence, and to the Massachusetts state line in Pawtucket. It has two auxiliary routes, both of which enter Massachusetts—I-195, a spur from Providence east to Cape Cod, and I-295, a western bypass of the Providence metropolitan area.
State Highway Route 138 is the portion of the 118-mile-long (190 km) multi-state Route 138 within the state of Connecticut. It is one of several New England state highways that travel through three states while keeping their number designation. The route begins in Sprague at Route 97. From its western terminus up to the junction with Interstate 395 in Griswold, the road functions as a collector road. From the Interstate 395 junction, it then enters Voluntown, and continues into the state of Rhode Island as Route 138.
Pachaug State Forest is the largest forest in the Connecticut state forest system, encompassing over 27,000 acres (110 km²) of land. It is located on the Rhode Island border in New London County, and parcels of the forest lie in the towns of Voluntown, Griswold, Plainfield, Sterling, North Stonington, and Preston. The forest was founded in 1928, but most of the land came from purchases made later during the Great Depression. It is named after the Pachaug River, which runs through the center of the forest. The forest is part of the Northeastern coastal forests ecoregion.
Connecticut Route 14 is one of several secondary routes from eastern Connecticut into Rhode Island. It runs from the Willimantic section of the town of Windham to the Rhode Island state line in Sterling.
Route 49 is a Connecticut state highway from Route 2 in Stonington to Route 14A in Sterling, in the southeast part of the state. It is a scenic route that runs 21.74 miles (34.99 km) through the Pachaug State Forest.
Route 201 is a state highway in southeastern Connecticut, running in an inverted "L" pattern from Stonington to Griswold.
Route 216 is a state highway in southeastern Connecticut, running entirely within the town of North Stonington. It connects Route 49 to the Rhode Island state line and serves the village of Clarks Falls.
Route 164 is a minor state highway in southeastern Connecticut, United States, running from Route 2 in Preston through the village of Preston City to Route 138 in Griswold just south of the borough of Jewett City.
Route 101 is a state highway in northeastern Connecticut running from Pomfret to the Rhode Island state line in Killingly. The road originated as a 19th-century toll road known as the Connecticut and Rhode Island Turnpike. Route 101 was designated along the modern alignment in 1935 when an earlier Route 101 was renumbered to U.S. Route 44.
The Last Green Valley National Heritage Corridor is a federally designated National Heritage Corridor in northeastern Connecticut and portions of Massachusetts. It has a rural character with rolling hills, farmland and classic New England scenery. This area was designated because it is one of the last remaining stretches of green in the Boston to Washington, D.C. heavily urbanized corridor. The valley also has the largest stretch of dark night sky in the Northeast megalopolis corridor. It contains some of the largest unbroken forests in Southern New England, in a region of Connecticut known as the Quiet Corner.
The Pachaug River is a 16.0-mile-long (25.7 km) river arising from the Pachaug State Forest at the Connecticut - Rhode Island border and draining into the Quinebaug River. It is crossed by the Ashland Mill Bridge in Griswold, Connecticut, a bridge which is listed on the U.S. National Register of Historic Places.
The Nehantic Trail is a 13-mile (21 km) Connecticut hiking trail and is one of the Blue-Blazed hiking trails maintained by the Connecticut Forest and Park Association.
The Quinebaug Trail is a 8.1-mile (13.0 km) Connecticut hiking trail and is one of the Blue-Blazed hiking trails maintained by the Connecticut Forest and Park Association.
The Pachaug Trail is a 28-mile (45 km) Connecticut hiking trail and is one of the Blue-Blazed hiking trails maintained by the Connecticut Forest and Park Association. It is a horseshoe shaped trail.
The Narragansett Trail is a 16-mile hiking trail located in Connecticut. It is one of the Blue-Blazed Trails maintained by the Connecticut Forest and Park Association, the Narragansett Council, and The Rhode Island chapter of Scouts BSA.
U.S. Route 44 (US 44) is an east–west United States Numbered Highway that runs for 237 miles (381 km) through four states in the Northeastern United States. The western terminus is at US 209 and New York State Route 55 (NY 55) in Kerhonkson, New York, a hamlet in the Hudson Valley region. The eastern terminus is at Route 3A in Plymouth, Massachusetts.
Route 2 in Norwich 
Route 49 / Route 138 in Voluntown, CT 
Route 165 in Exeter, RI 
