ADVENTURE ON A SHOESTRING
"Cosmopolitan Yorkville," Fri. at 1:15; "Millionaires' Row," Fri. at 4:30; "Haunted Greenwich Village," Sat. at 11:15; Splendid Grand Central Terminal," Sat. at 1:15; "Beekman Place-Sutton Place Area," Sat. at 3; "Idyllic Island," Sat. at 4:30; 265-2663 for res. & meeting place; all tours $5.
ATLANTIC AVENUE TUNNEL TOUR
Tour of the acclaimed world's oldest subway tunnel; Brooklyn's Atlantic Avenue Tunnel originally opened in 1841 & was sealed shut until its rediscovery 15 years ago; 718-875-8993 for meeting place; Sat. at 11:30, 1, 2:30 & 4, $15, $10/under 12.
BIG ONION WALKING TOURS
"Central Park," Sat. at 1; "Greenwich Village at Twilight," Sat. at 4; "Annual Easter Sunday Jewish Ellis Island Tour," Sun. at 12, $16, $14 st.; 439-1090 or www.bigonion.com for res. & meeting place, all tours $10, $8 st./s.c. unless otherwise noted.
CENTRAL PARK TOURS
Visualize Central Park during early 19th-century during "Views From the Past," Sat. & Sun. at 1, 794-6564 for info.; "Manhattan Adirondacks," Sat. at 11, 860-1370; "Rise & Shine in Conservatory Garden," Sat. at 11, 860-1370; "Cross Park Promenade," Sun. at 12, 360-2726; rsvp for res. & meeting place, free.
DR. PHIL'S NY WALKS & TALKS
Licensed guide Philip Schoenberg's tours of Brooklyn & Manhattan. 888-377-4455 for meeting place & info. Tickets now on sale for bus & walking tour of "Three World's Fair Sites" with a stop at the World's Fair Collector's show; June 4th, 9 a.m.-3, $60, rsvp by May 20th.
FOODS OF NEW YORK
"A Food Adventure of Greenwich Village" explores restaurants & specialty shops both new & old; 732-636-4650 or email@example.com for res. & meeting place; Weds.-Sun. & Tues. 11:30-1:30, $25 incl. lunch.
Joyce Gold Tours
Tours led by professor of Manhattan history, Joyce Gold. This week: "5th Ave. Gold Coast," Sun. at 1; 242-5762 for res. & meeting place, $12.
GREENWICH VILLAGE AT NIGHT
Guided tours of NY music clubs?hear three bands at three clubs. "Jazz & Blues," Weds.; "Blues," Thurs.; "Jazz, Blues & Stand-Up," Fri.; "Jazz & Blues," Sat.; 875-7019 for res., times & meeting place, $20 incl. live music.
i'll take manhattan
"Chinatown: The Year of the Dragon" tour explores the history, landmarks & architecture of Chinatown; 732-270-5277 for res. & meeting place; Sat. at 1, $10.
les Shopping Tour
Shopping tour of Orchard St. district; meets at Katz's Deli, 205 E. Houston St. (Ludlow St.); 226-9010; Sun. at 11, free.
Two-hour walking tour visits landmarks & eateries throughout the Lower East Side; 982-1697 for res. & meeting place; Sun. at 12, $10.
THE MANSIONS OF OLD ASTORIA VILLAGE
The Greater Astoria Historical Society hosts walking tour of Astoria Village; meets at Neptune Diner, Hoyt Ave. (31st St.), Astoria, 718-932-7983; Sat. at 2 free.
NY BOTANICAL TOURS
Weekly bird walks with "The Easter Bunny has Wings," Sat. & Sun. at 12:30; NY Botanical Garden; 200th St. (Southern Blvd.), Bronx, 718-817-8700, free w/grounds adm.
NYC Cultural Walking Tours
"Gargoyles in Manhattan" walking tour of more than 20 sites, led by licensed guide, Alfred Pommer; meet at 51 Madison Ave. (betw. 26th & 27th Sts.), 979-2388; Sun. at 2, $10 [through 4/30].
92nd St. Y tours
Extensive program of tours & trips in & outside of New York City. This week, "A Visit to the Bukharian Community," 996-1100 for res. & meeting place; Weds. at 10 a.m., $20.
STREET SMARTS NY
"Walks in Old Chelsea," Sat. at 2; "Greenwich Village Past & Present," Sat. at 2; "Joe Sent Me: Historic Speakeasy Tour," Sat. at 6; "Gramercy Park at Twilight," Sat. at 6; "From Pages to Pavement," Sun. at 2; 969-8262 for meeting place; all tours $10.
village literary pub crawl
Actors from The New Ensemble Theater Co. lead tour of four pubs giving literary histories & performances. Stops incl. Chumley's, the Cornelia St. Cafe, McBell's, the Cedar Tavern & the White Horse Tavern; meet at the White Horse Tavern, 567 Hudson St. (11th St.), 718-777-0706; Sat. at 2, call for prices.
the "WILDMAN" IS COMING...
Nature & ecology tour of Van Cortlandt Park with "Wildman" Steve Brill; 718-291-6825 for res.; Sun. at 11:45, $10, $5 kids.
Parades, Fairs & Outdoor Sporting Events
ASTOR PLACE FAIR
The street fair returns?international foods, crafts, jewelry, art & antiques; Astor Pl. (B'way to 4th Ave.), 809-4900; Sat. 11-6, free.
Environmentalist/bicycle-advocacy group sponsors monthly skates & rides throughout New York City. Today, "Critical Mass for Earth Day Action," bring noisemakers!; meet at Union Square S. (14th St.), 802-8222; Sat. at 2:30, free.